# Core File Kit (Basic File Services)

- [Introduction to Core File Kit](core-file-kit-intro.md)
- Application Files
  - [Application File Overview](app-file-overview.md)
  - [Application Sandbox](app-sandbox-directory.md)
  - Application File Access and Management
    - [Accessing Application Files (ArkTS)](app-file-access.md)
    - [Accessing Application Files (C/C++)](native-fileio-guidelines.md)
    - [Obtaining Application and File System Space Statistics](app-fs-space-statistics.md)
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  - [Pushing Files to an Application Sandbox Directory](send-file-to-app-sandbox.md)
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  - [Sharing an Application File](share-app-file.md)
  - Application Data Backup and Restore
    - [Application Data Backup and Restore Overview](app-file-backup-overview.md)
    - [Accessing Backup and Restore](app-file-backup-extension.md)
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    - [Triggering Backup and Restore (for System Applications Only)](app-file-backup.md)
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- User Files
  - [User File Overview](user-file-overview.md)
  - [User File URI](user-file-uri-intro.md)
  - [FileUri Development (C/C++)](native-fileuri-guidelines.md)
  - [Obtaining the User Directory Environment (C/C++)](native-environment-guidelines.md)
  - Selecting and Saving User Files
    - [Selecting User Files](select-user-file.md)
    - [Saving User Files](save-user-file.md)
    - [Persisting Temporary Permissions (ArkTS)](file-persistPermission.md)
    - [Persisting Temporary Permissions (C/C++)](native-fileshare-guidelines.md)
  - [Obtaining and Accessing a User Directory](request-dir-permission.md)
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  - [Developing a File Manager Application (for System Applications Only)](dev-user-file-manager.md)
  - [Managing External Storage Devices (for System Applications Only)](manage-external-storage.md)
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- Distributed File System
  - [Distributed File System Overview](distributed-fs-overview.md)
  - [Setting the Security Level of a Distributed File](set-security-label.md)
  - [Accessing Files Across Devices](file-access-across-devices.md)
  - [Copying Files Across Devices](file-copy-across-devices.md)