OneDrive File Backuper

Tool for backing up files from OneDrive.

Description

The application is developed in .NET 9. Using the Entra ID, the user generates a device token, which is then cached. For proper functionality, it is necessary to have the correct permissions set in the Entra ID. This token is used to authenticate against the Microsoft Graph API, allowing access to OneDrive. Files are downloaded from OneDrive, saved to a local path, and then deleted if set to do so.

Getting Started

Dependencies

• .NET 9 SDK
• Microsoft Entra ID (Azure AD) application registration
• OneDrive account

Installing

Azure

Create app registration.

Setting up the app registration.

The client id must be inserted into the program settings.

For app registration you need to enable Allow public client flows, which enables Device code flow.

You need to add the following permissions to the app registration to be able to work with files on One Drive.

If there is no need to delete files, just enable Files.Read permissions.

One Drive

No need to set up anything in OneDrive. Only the folder id and driver cid must be obtained from the url address. It is necessary to go to the folder from which the files will be backed up.

Program

Copy appsettings.json to your project root and fill in required values or set up user secrets.

{
  "EntraId": {
    "ClientId": ""
  },
  "OneDrive": {
    "Drive": "",
    "FileFolder": ""
  },
  "BackupSettings": {
    "DeleteAfterBackup": true
  },
  "LocalStorage": {
    "Path": ""
  }
}

• EntraId:ClientId - Retrieved from Azure portal.
• OneDrive:Drive - Retrieved from a url in OneDrive.
• OneDrive:FileFolder - Retrieved from a url in OneDrive.
• LocalStorage:Path - Path to local storage.
• BackupSettings:DeleteAfterBackup - Whether the files should be deleted after the backup.

Executing program

Start the program.

dotnet run --project ./Src

Project Structure

• Auth/ – Authentication providers for Entra ID and JWT tokens.
• Configurations/ – Dependency injection and options configuration.
• GraphClients/ – Microsoft Graph API client abstractions.
• Handlers/ – File synchronization logic.
• OneDrive/ – OneDrive service integration.
• Options/ – Strongly-typed options and validators.
• Storages/ – File storage abstractions.
• App.cs – Application entry point logic.
• Program.cs – Main program bootstrap.

Version History

• 0.1
  • Initial release

License

This project is licensed under the MIT License - see the LICENSE.md file for details.