If you are backing up your physical Wii game collection, you will likely encounter two common file extensions: and .wbfs .

Since the 7z format is highly compressed, your game file is "zipped" inside.

Use Wii Backup Manager to check the game ID and ensure it is placed in the wbfs folder on the root of your drive. Best Practices for WBFS Storage

The software will now convert the file to the optimized WBFS format (if it was an ISO) and copy it directly to your USB drive under the perfect directory format: USB:/wbfs/GameName [GameID]/GameID.wbfs . Alternative Method: Using Command-Line Tools (Mac & Linux)