diff --git a/ApplicationLibrary/Views/Abstract/ShareButton.swift b/ApplicationLibrary/Views/Abstract/ShareButton.swift
index 1721bbb..35ade79 100644
--- a/ApplicationLibrary/Views/Abstract/ShareButton.swift
+++ b/ApplicationLibrary/Views/Abstract/ShareButton.swift
@@ -35,22 +35,23 @@ public struct ProfileShareButton<Label>: View where Label: View {
 
     private var bodyCompat: some View {
         ShareButtonCompat(alert, label: label) {
-            try profile.toContent().generateShareFile()
+            try await profile.generateShareFileAsync()
         }
     }
 }
 
 public struct ShareButtonCompat<Label>: View where Label: View {
     private let label: () -> Label
-    private let itemURL: () throws -> URL
+    private let itemURL: () async throws -> URL
 
     @Binding private var alert: AlertState?
 
     #if os(macOS)
         @State private var sharePresented = false
+        @State private var shareItemURL: URL?
     #endif
 
-    public init(_ alert: Binding<AlertState?>, @ViewBuilder label: @escaping () -> Label, itemURL: @escaping () throws -> URL) {
+    public init(_ alert: Binding<AlertState?>, @ViewBuilder label: @escaping () -> Label, itemURL: @escaping () async throws -> URL) {
         _alert = alert
         self.label = label
         self.itemURL = itemURL
@@ -60,7 +61,7 @@ public struct ShareButtonCompat<Label>: View where Label: View {
         Button(action: shareItem, label: label)
             .buttonStyle(.plain)
         #if os(macOS)
-            .background(SharingServicePicker($sharePresented, $alert, itemURL))
+            .background(SharingServicePicker($sharePresented, $alert, $shareItemURL))
         #endif
     }
 
@@ -70,7 +71,9 @@ public struct ShareButtonCompat<Label>: View where Label: View {
                 await shareItemAsync()
             }
         #elseif os(macOS)
-            sharePresented = true
+            Task {
+                await shareItemAsync()
+            }
         #endif
     }
 
@@ -103,6 +106,21 @@ public struct ShareButtonCompat<Label>: View where Label: View {
                 animated: true
             )
         }
+
+    #elseif os(macOS)
+        private nonisolated func shareItemAsync() async {
+            do {
+                let shareItem = try await itemURL()
+                await MainActor.run {
+                    shareItemURL = shareItem
+                    sharePresented = true
+                }
+            } catch {
+                await MainActor.run {
+                    alert = AlertState(error: error)
+                }
+            }
+        }
     #endif
 }
 
@@ -110,12 +128,12 @@ public struct ShareButtonCompat<Label>: View where Label: View {
     private struct SharingServicePicker: NSViewRepresentable {
         @Binding private var isPresented: Bool
         @Binding private var alert: AlertState?
-        private let item: () throws -> URL
+        @Binding private var item: URL?
 
-        init(_ isPresented: Binding<Bool>, _ alert: Binding<AlertState?>, _ item: @escaping () throws -> URL) {
+        init(_ isPresented: Binding<Bool>, _ alert: Binding<AlertState?>, _ item: Binding<URL?>) {
             _isPresented = isPresented
             _alert = alert
-            self.item = item
+            _item = item
         }
 
         func makeNSView(context _: Context) -> NSView {
@@ -125,14 +143,15 @@ public struct ShareButtonCompat<Label>: View where Label: View {
 
         func updateNSView(_ nsView: NSView, context: Context) {
             if isPresented {
-                do {
-                    let picker = try NSSharingServicePicker(items: [item()])
-                    picker.delegate = context.coordinator
-                    DispatchQueue.main.async {
-                        picker.show(relativeTo: .zero, of: nsView, preferredEdge: .minY)
-                    }
-                } catch {
-                    alert = AlertState(error: error)
+                guard let item else {
+                    return
+                }
+                let picker = NSSharingServicePicker(items: [item])
+                picker.delegate = context.coordinator
+                picker.show(relativeTo: .zero, of: nsView, preferredEdge: .minY)
+                DispatchQueue.main.async {
+                    isPresented = false
+                    self.item = nil
                 }
             }
         }
diff --git a/ApplicationLibrary/Views/Dashboard/Cards/ProfileCard.swift b/ApplicationLibrary/Views/Dashboard/Cards/ProfileCard.swift
index a43ff62..df4ab72 100644
--- a/ApplicationLibrary/Views/Dashboard/Cards/ProfileCard.swift
+++ b/ApplicationLibrary/Views/Dashboard/Cards/ProfileCard.swift
@@ -78,6 +78,20 @@ public struct ProfileCard: View {
                     QRCodeSheet(profileName: profile.name, remoteURL: remoteURL)
                 }
             }
+            .sheet(
+                isPresented: $viewModel.showQRSShare,
+                onDismiss: {
+                    viewModel.qrsShareData = nil
+                    viewModel.qrsShareProfileName = nil
+                },
+                content: {
+                    if let data = viewModel.qrsShareData, let name = viewModel.qrsShareProfileName {
+                        QRSSheet(profileName: name, profileData: data)
+                    } else {
+                        ProgressView()
+                    }
+                }
+            )
         #else
             .sheet(isPresented: $viewModel.showNewProfile, onDismiss: {
                     environments.profileUpdate.send()
@@ -98,11 +112,20 @@ public struct ProfileCard: View {
                     }
                 }
             #endif
-                .sheet(isPresented: $viewModel.showQRSShare) {
-                    if let profile = selectedProfile, let data = try? profile.origin.toContent().encode() {
-                        QRSSheet(profileName: profile.name, profileData: data)
+                .sheet(
+                    isPresented: $viewModel.showQRSShare,
+                    onDismiss: {
+                        viewModel.qrsShareData = nil
+                        viewModel.qrsShareProfileName = nil
+                    },
+                    content: {
+                        if let data = viewModel.qrsShareData, let name = viewModel.qrsShareProfileName {
+                            QRSSheet(profileName: name, profileData: data)
+                        } else {
+                            ProgressView()
+                        }
                     }
-                }
+                )
                 .fileExporter(
                     isPresented: $viewModel.showExporter,
                     document: viewModel.exportDocument,
@@ -253,12 +276,10 @@ public struct ProfileCard: View {
                     }
                 }
 
-                if let data = try? profile.origin.toContent().encode() {
-                    FormNavigationLink {
-                        QRSSheet(profileName: profile.name, profileData: data)
-                    } label: {
-                        Label("Share as QRS Code", systemImage: "qrcode")
-                    }
+                Button {
+                    prepareQRSShare(profile)
+                } label: {
+                    Label("Share as QRS Code", systemImage: "qrcode")
                 }
             } label: {
                 Image(systemName: "square.and.arrow.up")
@@ -301,7 +322,7 @@ public struct ProfileCard: View {
                 }
 
                 Button {
-                    viewModel.showQRSShare = true
+                    prepareQRSShare(profile)
                 } label: {
                     Label("Share as QRS Code", systemImage: "qrcode")
                 }
@@ -333,42 +354,52 @@ public struct ProfileCard: View {
 
     #if !os(tvOS)
         private func shareProfile(_ profile: ProfilePreview, type: ShareItemType) {
-            do {
-                let url: URL
-                switch type {
-                case .file:
-                    url = try profile.origin.toContent().generateShareFile()
-                case .json:
-                    url = try profile.origin.read().generateShareFile(name: "\(profile.name).json")
+            Task {
+                do {
+                    let url: URL
+                    switch type {
+                    case .file:
+                        url = try await profile.origin.generateShareFileAsync()
+                    case .json:
+                        url = try await profile.origin.generateJSONShareFileAsync(name: "\(profile.name).json")
+                    }
+                    #if os(iOS)
+                        presentShareController(url)
+                    #elseif os(macOS)
+                        let anchorView = viewModel.shareButtonView ?? NSApp.keyWindow?.contentView ?? NSView()
+                        NSSharingServicePicker(items: [url]).show(
+                            relativeTo: .zero,
+                            of: anchorView,
+                            preferredEdge: .minY
+                        )
+                    #endif
+                } catch {
+                    viewModel.alert = AlertState(error: error)
                 }
-                #if os(iOS)
-                    presentShareController(url)
-                #elseif os(macOS)
-                    let anchorView = viewModel.shareButtonView ?? NSApp.keyWindow?.contentView ?? NSView()
-                    NSSharingServicePicker(items: [url]).show(
-                        relativeTo: .zero,
-                        of: anchorView,
-                        preferredEdge: .minY
-                    )
-                #endif
-            } catch {
-                viewModel.alert = AlertState(error: error)
             }
         }
 
         private func exportProfile(_ profile: ProfilePreview, type: ExportItemType) {
-            do {
-                switch type {
-                case .file:
-                    let doc = try ProfileExportDocument(content: profile.origin.toContent())
-                    viewModel.exportDocument = ProfileAnyExportDocument(profile: doc)
-                case .json:
-                    let doc = try ProfileJSONExportDocument(jsonContent: profile.origin.read(), name: profile.name)
-                    viewModel.exportDocument = ProfileAnyExportDocument(json: doc)
+            Task {
+                do {
+                    let document: ProfileAnyExportDocument
+                    switch type {
+                    case .file:
+                        let data = try await profile.origin.encodedContentDataAsync()
+                        document = ProfileAnyExportDocument(data: data, filename: "\(profile.name).bpf", contentType: .data)
+                    case .json:
+                        let content = try await profile.origin.readAsync()
+                        document = ProfileAnyExportDocument(data: Data(content.utf8), filename: "\(profile.name).json", contentType: .json)
+                    }
+                    await MainActor.run {
+                        viewModel.exportDocument = document
+                        viewModel.showExporter = true
+                    }
+                } catch {
+                    await MainActor.run {
+                        viewModel.alert = AlertState(error: error)
+                    }
                 }
-                viewModel.showExporter = true
-            } catch {
-                viewModel.alert = AlertState(error: error)
             }
         }
 
@@ -391,6 +422,20 @@ public struct ProfileCard: View {
         #endif
     #endif
 
+    private func prepareQRSShare(_ profile: ProfilePreview) {
+        viewModel.qrsShareProfileName = profile.name
+        viewModel.qrsShareData = nil
+        viewModel.showQRSShare = true
+        Task {
+            do {
+                viewModel.qrsShareData = try await profile.origin.encodedContentDataAsync()
+            } catch {
+                viewModel.alert = AlertState(error: error)
+                viewModel.showQRSShare = false
+            }
+        }
+    }
+
     @ViewBuilder
     private func profileInfo(for profile: ProfilePreview) -> some View {
         HStack(spacing: 8) {
@@ -474,6 +519,8 @@ extension ProfileCard {
         @Published var showProfilePicker = false
         @Published var showQRCode = false
         @Published var showQRSShare = false
+        @Published var qrsShareData: Data?
+        @Published var qrsShareProfileName: String?
         @Published var isUpdating = false
         @Published var alert: AlertState?
         @Published var profileToEdit: Profile?
diff --git a/ApplicationLibrary/Views/Dashboard/Cards/ProfilePickerSheet.swift b/ApplicationLibrary/Views/Dashboard/Cards/ProfilePickerSheet.swift
index 73136ae..ceeb1f6 100644
--- a/ApplicationLibrary/Views/Dashboard/Cards/ProfilePickerSheet.swift
+++ b/ApplicationLibrary/Views/Dashboard/Cards/ProfilePickerSheet.swift
@@ -529,6 +529,7 @@ private struct ProfilePickerRow: View {
     @State private var isUpdating = false
     @State private var showQRCode = false
     @State private var showQRSShare = false
+    @State private var qrsShareData: Data?
     #if os(macOS)
         @State private var shareItemType: ShareItemType?
         @State private var exportItemType: ExportItemType?
@@ -561,6 +562,19 @@ private struct ProfilePickerRow: View {
                     QRCodeSheet(profileName: profile.name, remoteURL: remoteURL)
                 }
             }
+            .sheet(
+                isPresented: $showQRSShare,
+                onDismiss: {
+                    qrsShareData = nil
+                },
+                content: {
+                    if let data = qrsShareData {
+                        QRSSheet(profileName: profile.name, profileData: data)
+                    } else {
+                        ProgressView()
+                    }
+                }
+            )
         }
 
         private var tvOSNormalBody: some View {
@@ -618,12 +632,10 @@ private struct ProfilePickerRow: View {
                             }
                         }
 
-                        if let data = try? profile.origin.toContent().encode() {
-                            FormNavigationLink {
-                                QRSSheet(profileName: profile.name, profileData: data)
-                            } label: {
-                                Label("Share as QRS Code", systemImage: "barcode")
-                            }
+                        Button {
+                            prepareQRSShare()
+                        } label: {
+                            Label("Share as QRS Code", systemImage: "barcode")
                         }
                     } label: {
                         Label("Share", systemImage: "square.and.arrow.up")
@@ -710,11 +722,19 @@ private struct ProfilePickerRow: View {
                         QRCodeSheet(profileName: profile.name, remoteURL: remoteURL)
                     }
                 }
-                .sheet(isPresented: $showQRSShare) {
-                    if let data = try? profile.origin.toContent().encode() {
-                        QRSSheet(profileName: profile.name, profileData: data)
+                .sheet(
+                    isPresented: $showQRSShare,
+                    onDismiss: {
+                        qrsShareData = nil
+                    },
+                    content: {
+                        if let data = qrsShareData {
+                            QRSSheet(profileName: profile.name, profileData: data)
+                        } else {
+                            ProgressView()
+                        }
                     }
-                }
+                )
                 .fileExporter(
                     isPresented: $showExporter,
                     document: exportDocument,
@@ -749,11 +769,19 @@ private struct ProfilePickerRow: View {
                         QRCodeSheet(profileName: profile.name, remoteURL: remoteURL)
                     }
                 }
-                .sheet(isPresented: $showQRSShare) {
-                    if let data = try? profile.origin.toContent().encode() {
-                        QRSSheet(profileName: profile.name, profileData: data)
+                .sheet(
+                    isPresented: $showQRSShare,
+                    onDismiss: {
+                        qrsShareData = nil
+                    },
+                    content: {
+                        if let data = qrsShareData {
+                            QRSSheet(profileName: profile.name, profileData: data)
+                        } else {
+                            ProgressView()
+                        }
                     }
-                }
+                )
                 .fileExporter(
                     isPresented: $showExporter,
                     document: exportDocument,
@@ -881,6 +909,24 @@ private struct ProfilePickerRow: View {
         #endif
     }
 
+    private func prepareQRSShare() {
+        qrsShareData = nil
+        showQRSShare = true
+        Task {
+            do {
+                let data = try await profile.origin.encodedContentDataAsync()
+                await MainActor.run {
+                    qrsShareData = data
+                }
+            } catch {
+                await MainActor.run {
+                    alert = AlertState(error: error)
+                    showQRSShare = false
+                }
+            }
+        }
+    }
+
     #if !os(tvOS)
         @ViewBuilder
         private var shareMenu: some View {
@@ -919,7 +965,7 @@ private struct ProfilePickerRow: View {
                     ShareButtonCompat($alert) {
                         Label("Share File", systemImage: "doc")
                     } itemURL: {
-                        try profile.origin.toContent().generateShareFile()
+                        try await profile.origin.generateShareFileAsync()
                     }
 
                     Button {
@@ -931,7 +977,7 @@ private struct ProfilePickerRow: View {
                     ShareButtonCompat($alert) {
                         Label("Share Content JSON File", systemImage: "curlybraces")
                     } itemURL: {
-                        try profile.origin.read().generateShareFile(name: "\(profile.name).json")
+                        try await profile.origin.generateJSONShareFileAsync(name: "\(profile.name).json")
                     }
                 #endif
 
@@ -944,7 +990,7 @@ private struct ProfilePickerRow: View {
                 }
 
                 Button {
-                    showQRSShare = true
+                    prepareQRSShare()
                 } label: {
                     Label("Share as QRS Code", systemImage: "barcode")
                 }
@@ -954,18 +1000,26 @@ private struct ProfilePickerRow: View {
         }
 
         private func exportProfile(type: ExportItemType) {
-            do {
-                switch type {
-                case .file:
-                    let doc = try ProfileExportDocument(content: profile.origin.toContent())
-                    exportDocument = ProfileAnyExportDocument(profile: doc)
-                case .json:
-                    let doc = try ProfileJSONExportDocument(jsonContent: profile.origin.read(), name: profile.name)
-                    exportDocument = ProfileAnyExportDocument(json: doc)
+            Task {
+                do {
+                    let document: ProfileAnyExportDocument
+                    switch type {
+                    case .file:
+                        let data = try await profile.origin.encodedContentDataAsync()
+                        document = ProfileAnyExportDocument(data: data, filename: "\(profile.name).bpf", contentType: .data)
+                    case .json:
+                        let content = try await profile.origin.readAsync()
+                        document = ProfileAnyExportDocument(data: Data(content.utf8), filename: "\(profile.name).json", contentType: .json)
+                    }
+                    await MainActor.run {
+                        exportDocument = document
+                        showExporter = true
+                    }
+                } catch {
+                    await MainActor.run {
+                        alert = AlertState(error: error)
+                    }
                 }
-                showExporter = true
-            } catch {
-                alert = AlertState(error: error)
             }
         }
     #endif
@@ -996,38 +1050,52 @@ private struct ProfilePickerRow: View {
 
     #if os(macOS)
         private func shareProfile(type: ShareItemType) {
-            do {
-                let url: URL
-                switch type {
-                case .file:
-                    url = try profile.origin.toContent().generateShareFile()
-                case .json:
-                    url = try profile.origin.read().generateShareFile(name: "\(profile.name).json")
+            Task {
+                do {
+                    let url: URL
+                    switch type {
+                    case .file:
+                        url = try await profile.origin.generateShareFileAsync()
+                    case .json:
+                        url = try await profile.origin.generateJSONShareFileAsync(name: "\(profile.name).json")
+                    }
+                    await MainActor.run {
+                        let anchorView = menuAnchorView ?? NSApp.keyWindow?.contentView ?? NSView()
+                        NSSharingServicePicker(items: [url]).show(
+                            relativeTo: .zero,
+                            of: anchorView,
+                            preferredEdge: .minY
+                        )
+                    }
+                } catch {
+                    await MainActor.run {
+                        alert = AlertState(error: error)
+                    }
                 }
-                let anchorView = menuAnchorView ?? NSApp.keyWindow?.contentView ?? NSView()
-                NSSharingServicePicker(items: [url]).show(
-                    relativeTo: .zero,
-                    of: anchorView,
-                    preferredEdge: .minY
-                )
-            } catch {
-                alert = AlertState(error: error)
             }
         }
 
         private func exportProfileMacOS(type: ExportItemType) {
-            do {
-                switch type {
-                case .file:
-                    let doc = try ProfileExportDocument(content: profile.origin.toContent())
-                    exportDocument = ProfileAnyExportDocument(profile: doc)
-                case .json:
-                    let doc = try ProfileJSONExportDocument(jsonContent: profile.origin.read(), name: profile.name)
-                    exportDocument = ProfileAnyExportDocument(json: doc)
+            Task {
+                do {
+                    let document: ProfileAnyExportDocument
+                    switch type {
+                    case .file:
+                        let data = try await profile.origin.encodedContentDataAsync()
+                        document = ProfileAnyExportDocument(data: data, filename: "\(profile.name).bpf", contentType: .data)
+                    case .json:
+                        let content = try await profile.origin.readAsync()
+                        document = ProfileAnyExportDocument(data: Data(content.utf8), filename: "\(profile.name).json", contentType: .json)
+                    }
+                    await MainActor.run {
+                        exportDocument = document
+                        showExporter = true
+                    }
+                } catch {
+                    await MainActor.run {
+                        alert = AlertState(error: error)
+                    }
                 }
-                showExporter = true
-            } catch {
-                alert = AlertState(error: error)
             }
         }
 
@@ -1135,6 +1203,7 @@ private struct ProfilePickerRow: View {
         @State private var isUpdating = false
         @State private var showQRCode = false
         @State private var showQRSShare = false
+        @State private var qrsShareData: Data?
         @State private var exportDocument: ProfileAnyExportDocument?
         @State private var showExporter = false
 
@@ -1194,11 +1263,19 @@ private struct ProfilePickerRow: View {
                     QRCodeSheet(profileName: profile.name, remoteURL: remoteURL)
                 }
             }
-            .sheet(isPresented: $showQRSShare) {
-                if let data = try? profile.origin.toContent().encode() {
-                    QRSSheet(profileName: profile.name, profileData: data)
+            .sheet(
+                isPresented: $showQRSShare,
+                onDismiss: {
+                    qrsShareData = nil
+                },
+                content: {
+                    if let data = qrsShareData {
+                        QRSSheet(profileName: profile.name, profileData: data)
+                    } else {
+                        ProgressView()
+                    }
                 }
-            }
+            )
             .fileExporter(
                 isPresented: $showExporter,
                 document: exportDocument,
@@ -1250,6 +1327,24 @@ private struct ProfilePickerRow: View {
             .buttonStyle(.plain)
         }
 
+        private func prepareQRSShare() {
+            qrsShareData = nil
+            showQRSShare = true
+            Task {
+                do {
+                    let data = try await profile.origin.encodedContentDataAsync()
+                    await MainActor.run {
+                        qrsShareData = data
+                    }
+                } catch {
+                    await MainActor.run {
+                        alert = AlertState(error: error)
+                        showQRSShare = false
+                    }
+                }
+            }
+        }
+
         @ViewBuilder
         private var shareMenu: some View {
             Menu {
@@ -1262,7 +1357,7 @@ private struct ProfilePickerRow: View {
                 ShareButtonCompat($alert) {
                     Label("Share File", systemImage: "doc")
                 } itemURL: {
-                    try profile.origin.toContent().generateShareFile()
+                    try await profile.origin.generateShareFileAsync()
                 }
 
                 Button {
@@ -1274,7 +1369,7 @@ private struct ProfilePickerRow: View {
                 ShareButtonCompat($alert) {
                     Label("Share Content JSON File", systemImage: "curlybraces")
                 } itemURL: {
-                    try profile.origin.read().generateShareFile(name: "\(profile.name).json")
+                    try await profile.origin.generateJSONShareFileAsync(name: "\(profile.name).json")
                 }
 
                 if profile.type == .remote {
@@ -1286,7 +1381,7 @@ private struct ProfilePickerRow: View {
                 }
 
                 Button {
-                    showQRSShare = true
+                    prepareQRSShare()
                 } label: {
                     Label("Share as QRS Code", systemImage: "barcode")
                 }
@@ -1296,18 +1391,26 @@ private struct ProfilePickerRow: View {
         }
 
         private func exportProfile(type: ExportItemType) {
-            do {
-                switch type {
-                case .file:
-                    let doc = try ProfileExportDocument(content: profile.origin.toContent())
-                    exportDocument = ProfileAnyExportDocument(profile: doc)
-                case .json:
-                    let doc = try ProfileJSONExportDocument(jsonContent: profile.origin.read(), name: profile.name)
-                    exportDocument = ProfileAnyExportDocument(json: doc)
+            Task {
+                do {
+                    let document: ProfileAnyExportDocument
+                    switch type {
+                    case .file:
+                        let data = try await profile.origin.encodedContentDataAsync()
+                        document = ProfileAnyExportDocument(data: data, filename: "\(profile.name).bpf", contentType: .data)
+                    case .json:
+                        let content = try await profile.origin.readAsync()
+                        document = ProfileAnyExportDocument(data: Data(content.utf8), filename: "\(profile.name).json", contentType: .json)
+                    }
+                    await MainActor.run {
+                        exportDocument = document
+                        showExporter = true
+                    }
+                } catch {
+                    await MainActor.run {
+                        alert = AlertState(error: error)
+                    }
                 }
-                showExporter = true
-            } catch {
-                alert = AlertState(error: error)
             }
         }
 
diff --git a/ApplicationLibrary/Views/Profile/EditProfileContentViewModel.swift b/ApplicationLibrary/Views/Profile/EditProfileContentViewModel.swift
index 35593b7..aeb3c67 100644
--- a/ApplicationLibrary/Views/Profile/EditProfileContentViewModel.swift
+++ b/ApplicationLibrary/Views/Profile/EditProfileContentViewModel.swift
@@ -48,27 +48,32 @@ public final class EditProfileContentViewModel: BaseViewModel {
     private func checkConfiguration() async {
         let content = profileContent
         if content.isEmpty { return }
-        var error: NSError?
-        LibboxCheckConfig(content, &error)
-        if let error {
-            configurationError = error.localizedDescription
-        } else {
-            configurationError = nil
+        let errorDescription: String? = await BlockingIO.run {
+            var error: NSError?
+            LibboxCheckConfig(content, &error)
+            return error?.localizedDescription
         }
+        configurationError = errorDescription
     }
 
     public func formatConfiguration() async {
         let content = profileContent
         if content.isEmpty { return }
-        var error: NSError?
-        let result = LibboxFormatConfig(content, &error)
-        if let error {
+        do {
+            let formatted: String? = try await BlockingIO.run {
+                var error: NSError?
+                let result = LibboxFormatConfig(content, &error)
+                if let error {
+                    throw error
+                }
+                return result?.value
+            }
+            if let formatted, formatted != content {
+                profileContent = formatted
+                isChanged = true
+            }
+        } catch {
             configurationError = error.localizedDescription
-            return
-        }
-        if let formatted = result?.value, formatted != content {
-            profileContent = formatted
-            isChanged = true
         }
     }
 
@@ -92,7 +97,7 @@ public final class EditProfileContentViewModel: BaseViewModel {
         guard let profile = try await ProfileManager.get(profileID) else {
             throw NSError(domain: "EditProfileContentViewModel", code: 0, userInfo: [NSLocalizedDescriptionKey: String(localized: "Profile missing")])
         }
-        let profileContent = try profile.read()
+        let profileContent = try await profile.readAsync()
         await MainActor.run {
             self.profile = profile
             self.profileContent = profileContent
@@ -114,6 +119,6 @@ public final class EditProfileContentViewModel: BaseViewModel {
 
     private nonisolated func saveContentBackground(_ profile: Profile) async throws {
         let profileContent = await profileContent
-        try profile.write(profileContent)
+        try await profile.writeAsync(profileContent)
     }
 }
diff --git a/ApplicationLibrary/Views/Profile/ImportProfileViewModel.swift b/ApplicationLibrary/Views/Profile/ImportProfileViewModel.swift
index 83f2c3a..2eea6ff 100644
--- a/ApplicationLibrary/Views/Profile/ImportProfileViewModel.swift
+++ b/ApplicationLibrary/Views/Profile/ImportProfileViewModel.swift
@@ -139,17 +139,32 @@
             default:
                 break
             }
+            let profileName = content.name
+            let profileConfigContent = content.config
+            let remotePath = content.remotePath
+            let autoUpdate = content.autoUpdate
+            let autoUpdateInterval = content.autoUpdateInterval
             let nextProfileID = try await ProfileManager.nextID()
             let profileConfigDirectory = FilePath.sharedDirectory.appendingPathComponent("configs", isDirectory: true)
-            try FileManager.default.createDirectory(at: profileConfigDirectory, withIntermediateDirectories: true)
             let profileConfig = profileConfigDirectory.appendingPathComponent("config_\(nextProfileID).json")
-            try content.config.write(to: profileConfig, atomically: true, encoding: .utf8)
+            try await BlockingIO.run {
+                try FileManager.default.createDirectory(at: profileConfigDirectory, withIntermediateDirectories: true)
+                try profileConfigContent.write(to: profileConfig, atomically: true, encoding: .utf8)
+            }
             var lastUpdated: Date?
             if content.lastUpdated > 0 {
                 lastUpdated = dateFromTimestamp(content.lastUpdated)
             }
-            let uniqueProfileName = try await ProfileManager.uniqueName(content.name)
-            let profile = Profile(name: uniqueProfileName, type: type, path: profileConfig.relativePath, remoteURL: content.remotePath, autoUpdate: content.autoUpdate, lastUpdated: lastUpdated)
+            let uniqueProfileName = try await ProfileManager.uniqueName(profileName)
+            let profile = Profile(
+                name: uniqueProfileName,
+                type: type,
+                path: profileConfig.relativePath,
+                remoteURL: remotePath,
+                autoUpdate: autoUpdate,
+                autoUpdateInterval: autoUpdateInterval,
+                lastUpdated: lastUpdated
+            )
             try await ProfileManager.create(profile)
             await SharedPreferences.selectedProfileID.set(profile.mustID)
             await reset()
diff --git a/ApplicationLibrary/Views/Profile/NewProfileMenuView.swift b/ApplicationLibrary/Views/Profile/NewProfileMenuView.swift
index 9d5bcd6..3be88a2 100644
--- a/ApplicationLibrary/Views/Profile/NewProfileMenuView.swift
+++ b/ApplicationLibrary/Views/Profile/NewProfileMenuView.swift
@@ -193,20 +193,26 @@ public struct NewProfileMenuView: View {
 
     #if !os(tvOS)
         private func handleFileImport(_ result: Result<[URL], Error>) {
-            do {
-                let urls = try result.get()
-                guard let url = urls.first else { return }
+            Task { @MainActor in
+                do {
+                    let urls = try result.get()
+                    guard let url = urls.first else { return }
 
-                if url.pathExtension.lowercased() == "json" {
-                    let fileName = url.deletingPathExtension().lastPathComponent
-                    localImportRequest = NewProfileView.LocalImportRequest(name: fileName, fileURL: url)
-                } else {
-                    let content = try url.withRequiredSecurityScopedAccess(
-                        or: NSError(domain: "NewProfileMenuView", code: 0, userInfo: [NSLocalizedDescriptionKey: String(localized: "Missing access to selected file")])
-                    ) {
-                        try LibboxProfileContent.from(Data(contentsOf: url))
+                    if url.pathExtension.lowercased() == "json" {
+                        let fileName = url.deletingPathExtension().lastPathComponent
+                        localImportRequest = NewProfileView.LocalImportRequest(name: fileName, fileURL: url)
+                        return
                     }
 
+                    let data = try await BlockingIO.run {
+                        try url.withRequiredSecurityScopedAccess(
+                            or: NSError(domain: "NewProfileMenuView", code: 0, userInfo: [NSLocalizedDescriptionKey: String(localized: "Missing access to selected file")])
+                        ) {
+                            try Data(contentsOf: url)
+                        }
+                    }
+                    let content = try LibboxProfileContent.from(data)
+
                     alert = AlertState(
                         title: String(localized: "Import Profile"),
                         message: String(localized: "Are you sure to import profile \(content.name)?"),
@@ -223,9 +229,9 @@ public struct NewProfileMenuView: View {
                         },
                         secondaryButton: .cancel()
                     )
+                } catch {
+                    alert = AlertState(error: error)
                 }
-            } catch {
-                alert = AlertState(error: error)
             }
         }
     #endif
diff --git a/ApplicationLibrary/Views/Profile/NewProfileViewModel.swift b/ApplicationLibrary/Views/Profile/NewProfileViewModel.swift
index 44c742e..1a8d74c 100644
--- a/ApplicationLibrary/Views/Profile/NewProfileViewModel.swift
+++ b/ApplicationLibrary/Views/Profile/NewProfileViewModel.swift
@@ -107,43 +107,52 @@ public final class NewProfileViewModel: BaseViewModel {
 
         if profileType == .local {
             let profileConfigDirectory = FilePath.sharedDirectory.appendingPathComponent("configs", isDirectory: true)
-            try FileManager.default.createDirectory(at: profileConfigDirectory, withIntermediateDirectories: true)
             let profileConfig = profileConfigDirectory.appendingPathComponent("config_\(nextProfileID).json")
-            if fileImport {
-                guard let fileURL else {
-                    throw NSError(domain: "NewProfileViewModel", code: 0, userInfo: [NSLocalizedDescriptionKey: String(localized: "Missing file")])
+            try await BlockingIO.run {
+                try FileManager.default.createDirectory(at: profileConfigDirectory, withIntermediateDirectories: true)
+                if fileImport {
+                    guard let fileURL else {
+                        throw NSError(domain: "NewProfileViewModel", code: 0, userInfo: [NSLocalizedDescriptionKey: String(localized: "Missing file")])
+                    }
+                    try fileURL.withRequiredSecurityScopedAccess(
+                        or: NSError(domain: "NewProfileViewModel", code: 0, userInfo: [NSLocalizedDescriptionKey: String(localized: "Missing access to selected file")])
+                    ) {
+                        try String(contentsOf: fileURL).write(to: profileConfig, atomically: true, encoding: .utf8)
+                    }
+                } else {
+                    try "{}".write(to: profileConfig, atomically: true, encoding: .utf8)
                 }
-                try fileURL.withRequiredSecurityScopedAccess(
-                    or: NSError(domain: "NewProfileViewModel", code: 0, userInfo: [NSLocalizedDescriptionKey: String(localized: "Missing access to selected file")])
-                ) {
-                    try String(contentsOf: fileURL).write(to: profileConfig, atomically: true, encoding: .utf8)
-                }
-            } else {
-                try "{}".write(to: profileConfig, atomically: true, encoding: .utf8)
             }
             savePath = profileConfig.relativePath
         } else if profileType == .icloud {
-            if !FileManager.default.fileExists(atPath: FilePath.iCloudDirectory.path) {
-                try FileManager.default.createDirectory(at: FilePath.iCloudDirectory, withIntermediateDirectories: true)
-            }
-            let saveURL = FilePath.iCloudDirectory.appendingPathComponent(remotePath, isDirectory: false)
-            do {
-                _ = try String(contentsOf: saveURL)
-            } catch {
-                try "{}".write(to: saveURL, atomically: true, encoding: .utf8)
+            let iCloudDirectory = FilePath.iCloudDirectory
+            try await BlockingIO.run {
+                if !FileManager.default.fileExists(atPath: iCloudDirectory.path) {
+                    try FileManager.default.createDirectory(at: iCloudDirectory, withIntermediateDirectories: true)
+                }
+                let saveURL = iCloudDirectory.appendingPathComponent(remotePath, isDirectory: false)
+                do {
+                    _ = try String(contentsOf: saveURL)
+                } catch {
+                    try "{}".write(to: saveURL, atomically: true, encoding: .utf8)
+                }
             }
             savePath = remotePath
         } else if profileType == .remote {
-            let remoteContent = try HTTPClient().getString(remotePath)
-            var error: NSError?
-            LibboxCheckConfig(remoteContent, &error)
-            if let error {
-                throw error
+            let remoteContent = try await HTTPClient.getStringAsync(remotePath)
+            try await BlockingIO.run {
+                var error: NSError?
+                LibboxCheckConfig(remoteContent, &error)
+                if let error {
+                    throw error
+                }
             }
             let profileConfigDirectory = FilePath.sharedDirectory.appendingPathComponent("configs", isDirectory: true)
-            try FileManager.default.createDirectory(at: profileConfigDirectory, withIntermediateDirectories: true)
             let profileConfig = profileConfigDirectory.appendingPathComponent("config_\(nextProfileID).json")
-            try remoteContent.write(to: profileConfig, atomically: true, encoding: .utf8)
+            try await BlockingIO.run {
+                try FileManager.default.createDirectory(at: profileConfigDirectory, withIntermediateDirectories: true)
+                try remoteContent.write(to: profileConfig, atomically: true, encoding: .utf8)
+            }
             savePath = profileConfig.relativePath
             remoteURL = remotePath
             lastUpdated = .now
diff --git a/ApplicationLibrary/Views/Setting/CoreView.swift b/ApplicationLibrary/Views/Setting/CoreView.swift
index 96be3c2..a97e15d 100644
--- a/ApplicationLibrary/Views/Setting/CoreView.swift
+++ b/ApplicationLibrary/Views/Setting/CoreView.swift
@@ -150,22 +150,24 @@ public struct CoreView: View {
         #if os(macOS)
             let helperUnavailable = Variant.useSystemExtension && HelperServiceManager.rootHelperStatus != .enabled
         #endif
-        let dataSize: String?
-        #if os(macOS)
-            if Variant.useSystemExtension {
-                if helperUnavailable {
-                    dataSize = nil
-                } else if let size = try? RootHelperClient.shared.getWorkingDirectorySize() {
-                    dataSize = LibboxFormatBytes(size)
+        let workingDirectory = FilePath.workingDirectory
+        let dataSize: String? = await BlockingIO.run {
+            #if os(macOS)
+                if Variant.useSystemExtension {
+                    if helperUnavailable {
+                        return nil
+                    }
+                    guard let size = try? RootHelperClient.shared.getWorkingDirectorySize() else {
+                        return nil
+                    }
+                    return LibboxFormatBytes(size)
                 } else {
-                    dataSize = nil
+                    return (try? workingDirectory.formattedSize()) ?? "Unknown"
                 }
-            } else {
-                dataSize = (try? FilePath.workingDirectory.formattedSize()) ?? "Unknown"
-            }
-        #else
-            dataSize = (try? FilePath.workingDirectory.formattedSize()) ?? "Unknown"
-        #endif
+            #else
+                return (try? workingDirectory.formattedSize()) ?? "Unknown"
+            #endif
+        }
         await MainActor.run {
             #if os(macOS)
                 self.helperUnavailable = helperUnavailable
@@ -208,14 +210,21 @@ public struct CoreView: View {
 
     private func destroyWorkingDirectory() async {
         do {
+            let workingDirectory = FilePath.workingDirectory
             #if os(macOS)
                 if Variant.useSystemExtension {
-                    try RootHelperClient.shared.cleanWorkingDirectory()
+                    try await BlockingIO.run {
+                        try RootHelperClient.shared.cleanWorkingDirectory()
+                    }
                 } else {
-                    try clearWorkingDirectoryContents()
+                    try await BlockingIO.run {
+                        try Self.clearWorkingDirectoryContents(at: workingDirectory)
+                    }
                 }
             #else
-                try clearWorkingDirectoryContents()
+                try await BlockingIO.run {
+                    try Self.clearWorkingDirectoryContents(at: workingDirectory)
+                }
                 #if os(iOS)
                     if #available(iOS 16.0, *) {
                         await notifyFileProviderWorkingDirectoryChanged()
@@ -228,8 +237,7 @@ public struct CoreView: View {
         }
     }
 
-    private func clearWorkingDirectoryContents() throws {
-        let url = FilePath.workingDirectory
+    private nonisolated static func clearWorkingDirectoryContents(at url: URL) throws {
         guard FileManager.default.fileExists(atPath: url.path) else {
             return
         }
@@ -301,11 +309,15 @@ public struct CoreView: View {
 
 private extension URL {
     func formattedSize() throws -> String? {
-        guard let urls = FileManager.default.enumerator(at: self, includingPropertiesForKeys: nil)?.allObjects as? [URL] else {
+        guard let enumerator = FileManager.default.enumerator(
+            at: self,
+            includingPropertiesForKeys: [.totalFileAllocatedSizeKey]
+        ) else {
             return nil
         }
-        let size = try urls.lazy.reduce(0) {
-            try ($1.resourceValues(forKeys: [.totalFileAllocatedSizeKey]).totalFileAllocatedSize ?? 0) + $0
+        var size = 0
+        while let url = enumerator.nextObject() as? URL {
+            size += try url.resourceValues(forKeys: [.totalFileAllocatedSizeKey]).totalFileAllocatedSize ?? 0
         }
         let formatter = ByteCountFormatter()
         formatter.countStyle = .file
diff --git a/ApplicationLibrary/Views/Setting/ServiceLogView.swift b/ApplicationLibrary/Views/Setting/ServiceLogView.swift
index cbcca11..1d06772 100644
--- a/ApplicationLibrary/Views/Setting/ServiceLogView.swift
+++ b/ApplicationLibrary/Views/Setting/ServiceLogView.swift
@@ -38,7 +38,7 @@ public struct ServiceLogView: View {
                     ShareButtonCompat($viewModel.alert) {
                         Label("Export", systemImage: "square.and.arrow.up.fill")
                     } itemURL: {
-                        try viewModel.generateShareFile()
+                        try await viewModel.generateShareFileAsync()
                     }
                 #endif
                 Button(role: .destructive) {
diff --git a/ApplicationLibrary/Views/Setting/ServiceLogViewModel.swift b/ApplicationLibrary/Views/Setting/ServiceLogViewModel.swift
index 6642171..0aa4124 100644
--- a/ApplicationLibrary/Views/Setting/ServiceLogViewModel.swift
+++ b/ApplicationLibrary/Views/Setting/ServiceLogViewModel.swift
@@ -16,14 +16,13 @@ final class ServiceLogViewModel: BaseViewModel {
     }
 
     nonisolated func loadContent() async {
-        var content = ""
-        do {
-            content = try String(contentsOf: FilePath.cacheDirectory.appendingPathComponent("stderr.log"))
-        } catch {}
-        if content.isEmpty {
-            do {
-                content = try String(contentsOf: FilePath.cacheDirectory.appendingPathComponent("stderr.log.old"))
-            } catch {}
+        let primaryLogURL = FilePath.cacheDirectory.appendingPathComponent("stderr.log")
+        let secondaryLogURL = FilePath.cacheDirectory.appendingPathComponent("stderr.log.old")
+        var content = await BlockingIO.run {
+            if let primaryContent = try? String(contentsOf: primaryLogURL), !primaryContent.isEmpty {
+                return primaryContent
+            }
+            return (try? String(contentsOf: secondaryLogURL)) ?? ""
         }
         #if DEBUG
             if content.isEmpty {
@@ -53,8 +52,12 @@ final class ServiceLogViewModel: BaseViewModel {
     }
 
     nonisolated func deleteContent(dismiss: DismissAction) async {
-        try? FileManager.default.removeItem(at: FilePath.cacheDirectory.appendingPathComponent("stderr.log"))
-        try? FileManager.default.removeItem(at: FilePath.cacheDirectory.appendingPathComponent("stderr.log.old"))
+        let primaryLogURL = FilePath.cacheDirectory.appendingPathComponent("stderr.log")
+        let secondaryLogURL = FilePath.cacheDirectory.appendingPathComponent("stderr.log.old")
+        await BlockingIO.run {
+            try? FileManager.default.removeItem(at: primaryLogURL)
+            try? FileManager.default.removeItem(at: secondaryLogURL)
+        }
         await MainActor.run {
             dismiss()
             isLoading = true
@@ -64,4 +67,11 @@ final class ServiceLogViewModel: BaseViewModel {
     func generateShareFile() throws -> URL {
         try content.generateShareFile(name: "service.log")
     }
+
+    func generateShareFileAsync() async throws -> URL {
+        let content = content
+        return try await BlockingIO.run {
+            try content.generateShareFile(name: "service.log")
+        }
+    }
 }
diff --git a/Library/Database/Profile+RW.swift b/Library/Database/Profile+RW.swift
index 4d9cdd9..d68fdac 100644
--- a/Library/Database/Profile+RW.swift
+++ b/Library/Database/Profile+RW.swift
@@ -2,6 +2,9 @@ import Foundation
 
 public extension Profile {
     func read() throws -> String {
+        #if DEBUG
+            precondition(!Thread.isMainThread, "Profile.read() must not be called on the main thread")
+        #endif
         switch type {
         case .local, .remote:
             return try String(contentsOfFile: path)
@@ -12,6 +15,9 @@ public extension Profile {
     }
 
     func write(_ content: String) throws {
+        #if DEBUG
+            precondition(!Thread.isMainThread, "Profile.write(...) must not be called on the main thread")
+        #endif
         switch type {
         case .local, .remote:
             try content.write(toFile: path, atomically: true, encoding: .utf8)
@@ -20,4 +26,33 @@ public extension Profile {
             try content.write(to: saveURL, atomically: true, encoding: .utf8)
         }
     }
+
+    func readAsync() async throws -> String {
+        let type = type
+        let path = path
+        return try await BlockingIO.run {
+            switch type {
+            case .local, .remote:
+                return try String(contentsOfFile: path)
+            case .icloud:
+                let saveURL = FilePath.iCloudDirectory.appendingPathComponent(path)
+                return try String(contentsOf: saveURL)
+            }
+        }
+    }
+
+    func writeAsync(_ content: String) async throws {
+        let type = type
+        let path = path
+        let content = content
+        try await BlockingIO.run {
+            switch type {
+            case .local, .remote:
+                try content.write(toFile: path, atomically: true, encoding: .utf8)
+            case .icloud:
+                let saveURL = FilePath.iCloudDirectory.appendingPathComponent(path)
+                try content.write(to: saveURL, atomically: true, encoding: .utf8)
+            }
+        }
+    }
 }
diff --git a/Library/Database/Profile+Transferable.swift b/Library/Database/Profile+Transferable.swift
index b308638..92307bf 100644
--- a/Library/Database/Profile+Transferable.swift
+++ b/Library/Database/Profile+Transferable.swift
@@ -26,6 +26,79 @@ public extension Profile {
         }
         return content
     }
+
+    func encodedContentDataAsync() async throws -> Data {
+        let name = name
+        let type = type
+        let remoteURL = remoteURL
+        let autoUpdate = autoUpdate
+        let autoUpdateInterval = autoUpdateInterval
+        let lastUpdated = lastUpdated
+
+        let config = try await readAsync()
+        return try await BlockingIO.run {
+            let content = LibboxProfileContent()
+            content.name = name
+            switch type {
+            case .local, .icloud:
+                content.type = LibboxProfileTypeLocal
+            case .remote:
+                content.type = LibboxProfileTypeRemote
+            }
+            content.config = config
+            if type == .remote {
+                content.remotePath = remoteURL!
+                content.autoUpdate = autoUpdate
+                content.autoUpdateInterval = autoUpdateInterval
+                if let lastUpdated {
+                    content.lastUpdated = Int64(lastUpdated.timeIntervalSince1970 * 1000)
+                }
+            }
+            guard let encoded = content.encode() else {
+                throw NSError(domain: "Profile", code: -1, userInfo: [NSLocalizedDescriptionKey: "Failed to encode profile"])
+            }
+            return encoded
+        }
+    }
+
+    func generateShareFileAsync() async throws -> URL {
+        let name = name
+        let type = type
+        let remoteURL = remoteURL
+        let autoUpdate = autoUpdate
+        let autoUpdateInterval = autoUpdateInterval
+        let lastUpdated = lastUpdated
+
+        let config = try await readAsync()
+        return try await BlockingIO.run {
+            let content = LibboxProfileContent()
+            content.name = name
+            switch type {
+            case .local, .icloud:
+                content.type = LibboxProfileTypeLocal
+            case .remote:
+                content.type = LibboxProfileTypeRemote
+            }
+            content.config = config
+            if type == .remote {
+                content.remotePath = remoteURL!
+                content.autoUpdate = autoUpdate
+                content.autoUpdateInterval = autoUpdateInterval
+                if let lastUpdated {
+                    content.lastUpdated = Int64(lastUpdated.timeIntervalSince1970 * 1000)
+                }
+            }
+            return try content.generateShareFile()
+        }
+    }
+
+    func generateJSONShareFileAsync(name: String) async throws -> URL {
+        let filename = name
+        let config = try await readAsync()
+        return try await BlockingIO.run {
+            try config.generateShareFile(name: filename)
+        }
+    }
 }
 
 public func dateFromTimestamp(_ timestamp: Int64) -> Date {
@@ -57,17 +130,34 @@ public extension LibboxProfileContent {
 
     @discardableResult
     func importProfile() async throws -> Profile {
+        let name = name
+        let type = type
+        let config = config
+        let remotePath = remotePath
+        let autoUpdate = autoUpdate
+        let autoUpdateInterval = autoUpdateInterval
+        let lastUpdated = lastUpdated
         let nextProfileID = try await ProfileManager.nextID()
         let profileConfigDirectory = FilePath.sharedDirectory.appendingPathComponent("configs", isDirectory: true)
-        try FileManager.default.createDirectory(at: profileConfigDirectory, withIntermediateDirectories: true)
         let profileConfig = profileConfigDirectory.appendingPathComponent("config_\(nextProfileID).json")
-        try config.write(to: profileConfig, atomically: true, encoding: .utf8)
         var lastUpdatedAt: Date?
         if lastUpdated > 0 {
             lastUpdatedAt = dateFromTimestamp(lastUpdated)
         }
+        try await BlockingIO.run {
+            try FileManager.default.createDirectory(at: profileConfigDirectory, withIntermediateDirectories: true)
+            try config.write(to: profileConfig, atomically: true, encoding: .utf8)
+        }
         let uniqueProfileName = try await ProfileManager.uniqueName(name)
-        let profile = Profile(name: uniqueProfileName, type: ProfileType(rawValue: Int(type))!, path: profileConfig.relativePath, remoteURL: remotePath, autoUpdate: autoUpdate, autoUpdateInterval: autoUpdateInterval, lastUpdated: lastUpdatedAt)
+        let profile = Profile(
+            name: uniqueProfileName,
+            type: ProfileType(rawValue: Int(type))!,
+            path: profileConfig.relativePath,
+            remoteURL: remotePath,
+            autoUpdate: autoUpdate,
+            autoUpdateInterval: autoUpdateInterval,
+            lastUpdated: lastUpdatedAt
+        )
         try await ProfileManager.create(profile)
         await SharedPreferences.selectedProfileID.set(profile.mustID)
         return profile
@@ -190,6 +280,12 @@ public extension UTType {
         public let filename: String
         public let contentType: UTType
 
+        public init(data: Data, filename: String, contentType: UTType) {
+            self.data = data
+            self.filename = filename
+            self.contentType = contentType
+        }
+
         public init(profile: ProfileExportDocument) {
             data = profile.data
             filename = profile.filename
diff --git a/Library/Database/Profile+Update.swift b/Library/Database/Profile+Update.swift
index 9386aed..b2b91f3 100644
--- a/Library/Database/Profile+Update.swift
+++ b/Library/Database/Profile+Update.swift
@@ -7,21 +7,23 @@ public extension Profile {
         if type != .remote {
             return
         }
-        let remoteContent = try HTTPClient().getString(remoteURL)
-        var error: NSError?
-        LibboxCheckConfig(remoteContent, &error)
-        if let error {
-            throw error
+        let remoteContent = try await HTTPClient.getStringAsync(remoteURL)
+        try await BlockingIO.run {
+            var error: NSError?
+            LibboxCheckConfig(remoteContent, &error)
+            if let error {
+                throw error
+            }
         }
         lastUpdated = Date()
         try await ProfileManager.update(self)
         do {
-            let oldContent = try read()
+            let oldContent = try await readAsync()
             if oldContent == remoteContent {
                 return
             }
         } catch {}
-        try write(remoteContent)
+        try await writeAsync(remoteContent)
         try await onProfileUpdated()
     }
 
diff --git a/Library/Network/ExtensionProfile.swift b/Library/Network/ExtensionProfile.swift
index 835cd47..d72f1b6 100644
--- a/Library/Network/ExtensionProfile.swift
+++ b/Library/Network/ExtensionProfile.swift
@@ -193,7 +193,7 @@ public class ExtensionProfile: ObservableObject {
             ])
         }
 
-        let configContent = try profile.read()
+        let configContent = try await profile.readAsync()
         options["configContent"] = NSString(string: configContent)
 
         options["ignoreMemoryLimit"] = await NSNumber(value: SharedPreferences.ignoreMemoryLimit.get())
@@ -215,10 +215,9 @@ public class ExtensionProfile: ObservableObject {
     }
 
     public func fetchProfile() async throws {
-        if let profile = try await ProfileManager.get(Int64(SharedPreferences.selectedProfileID.get())) {
-            if profile.type == .icloud {
-                _ = try profile.read()
-            }
+        let profileID = await SharedPreferences.selectedProfileID.get()
+        if let profile = try await ProfileManager.get(profileID), profile.type == .icloud {
+            _ = try await profile.readAsync()
         }
     }
 
diff --git a/Library/Network/HTTPClient.swift b/Library/Network/HTTPClient.swift
index 8e247fe..ca40f73 100644
--- a/Library/Network/HTTPClient.swift
+++ b/Library/Network/HTTPClient.swift
@@ -24,6 +24,9 @@ public class HTTPClient {
     }
 
     public func getString(_ url: String?) throws -> String {
+        #if DEBUG
+            precondition(!Thread.isMainThread, "HTTPClient.getString(...) must not be called on the main thread")
+        #endif
         let request = client.newRequest()!
         request.setUserAgent(HTTPClient.userAgent)
         try request.setURL(url)
@@ -32,6 +35,16 @@ public class HTTPClient {
         return content.value
     }
 
+    public func getStringAsync(_ url: String?) async throws -> String {
+        try await Self.getStringAsync(url)
+    }
+
+    public static func getStringAsync(_ url: String?) async throws -> String {
+        try await BlockingIO.run {
+            try HTTPClient().getString(url)
+        }
+    }
+
     deinit {
         client.close()
     }
diff --git a/Library/Network/RootHelperXPC.swift b/Library/Network/RootHelperXPC.swift
index f87eca8..623b1bd 100644
--- a/Library/Network/RootHelperXPC.swift
+++ b/Library/Network/RootHelperXPC.swift
@@ -57,7 +57,7 @@
         }
     }
 
-    public class RootHelperClient {
+    public class RootHelperClient: @unchecked Sendable {
         public static let shared = RootHelperClient()
 
         private var connection: NSXPCConnection?
diff --git a/Library/Shared/BlockingIO.swift b/Library/Shared/BlockingIO.swift
new file mode 100644
index 0000000..f1610c6
--- /dev/null
+++ b/Library/Shared/BlockingIO.swift
@@ -0,0 +1,35 @@
+import Foundation
+
+public enum BlockingIO {
+    private static let queue = DispatchQueue(
+        label: "io.nekohasekai.sing-box.blocking-io",
+        qos: .userInitiated,
+        attributes: .concurrent
+    )
+
+    public static func run<T: Sendable>(_ operation: @escaping @Sendable () throws -> T) async throws -> T {
+        try await withCheckedThrowingContinuation { continuation in
+            queue.async {
+                #if DEBUG
+                    precondition(!Thread.isMainThread, "BlockingIO operation must not run on the main thread")
+                #endif
+                do {
+                    try continuation.resume(returning: operation())
+                } catch {
+                    continuation.resume(throwing: error)
+                }
+            }
+        }
+    }
+
+    public static func run<T: Sendable>(_ operation: @escaping @Sendable () -> T) async -> T {
+        await withCheckedContinuation { continuation in
+            queue.async {
+                #if DEBUG
+                    precondition(!Thread.isMainThread, "BlockingIO operation must not run on the main thread")
+                #endif
+                continuation.resume(returning: operation())
+            }
+        }
+    }
+}