Drag the extracted world folder into this "saves" directory.
Data for the Overworld, Nether, and End dimensions. Minceaftbackup.7z
This archive typically holds all essential data required to restore a specific state of your game: Drag the extracted world folder into this "saves" directory
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) it may also include plugins
If it's a server backup, it may also include plugins, configuration files, and logs. How to Use and Restore the File