Minceaftbackup.7z

The world should now appear in your single-player menu. Why use .7z for Minecraft? How to BACKUP your Minecraft World! 1.21.4 (Java Edition)

If it's a server backup, it may also include plugins, configuration files, and logs. How to Use and Restore the File Minceaftbackup.7z

To use this backup, you must extract its contents back into your game's directory. Tools like 7-Zip are highly recommended because they can handle the .7z format more efficiently than standard Windows compression. The world should now appear in your single-player menu