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