1# Core File Kit<!--core-file-kit--> 2 3<!--Kit: Core File Kit--> 4<!--Subsystem: FileManagement--> 5<!--Owner: @wangke25--> 6<!--Designer: @bubble_mao; @zhuangzhuang; @gsl_1234--> 7<!--Tester: @liuhonggang123--> 8<!--Adviser: @foryourself--> 9 10- [Introduction to Core File Kit](core-file-kit-intro.md) 11- Application Files<!--app-file--> 12 - [Application File Overview](app-file-overview.md) 13 - [Application Sandbox](app-sandbox-directory.md) 14 - Application File Access and Management<!--app-file-access-management--> 15 - [Accessing Application Files (ArkTS)](app-file-access.md) 16 - [Accessing Application Files (C/C++)](native-fileio-guidelines.md) 17 - [Obtaining Application and File System Space Statistics](app-fs-space-statistics.md) 18 <!--Del--> 19 - [Pushing Files to an Application Sandbox Directory](send-file-to-app-sandbox.md) 20 <!--DelEnd--> 21 - [Sharing an Application File](share-app-file.md) 22 - Application Data Backup and Restore<!--app-file-backup-restore--> 23 - [Application Data Backup and Restore Overview](app-file-backup-overview.md) 24 - [Accessing Backup and Restore](app-file-backup-extension.md) 25 <!--Del--> 26 - [Triggering Backup and Restore (for System Applications Only)](app-file-backup.md) 27 <!--DelEnd--> 28- User Files<!--user-files--> 29 - [User File Overview](user-file-overview.md) 30 - [User File URI](user-file-uri-intro.md) 31 - [FileUri Development (C/C++)](native-fileuri-guidelines.md) 32 - [Obtaining the User Directory Environment (C/C++)](native-environment-guidelines.md) 33 - Selecting and Saving User Files<!--select-save-user-file--> 34 - [Selecting User Files](select-user-file.md) 35 - [Saving User Files](save-user-file.md) 36 - [Persisting Temporary Permissions (ArkTS)](file-persistPermission.md) 37 - [Persisting Temporary Permissions (C/C++)](native-fileshare-guidelines.md) 38 - [Obtaining and Accessing a User Directory](request-dir-permission.md) 39 <!--Del--> 40 - [Developing a FileManager Application (for System Applications Only)](dev-user-file-manager.md) 41 - [Managing External Storage Devices (for System Applications Only)](manage-external-storage.md) 42 <!--DelEnd--> 43- Distributed File System<!--distributed-fs--> 44 - [Distributed File System Overview](distributed-fs-overview.md) 45 - [Setting the Security Level of a Distributed File](set-security-label.md) 46 - [Accessing Files Across Devices](file-access-across-devices.md) 47 - [Copying Files Across Devices](file-copy-across-devices.md) 48