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)
Data for the Overworld, Nether, and End dimensions.
Press Win+R , type %appdata% , and navigate to .minecraft/saves . Minceaftbackup.7z
The file is a compressed archive containing a backup of a Minecraft world or server, created using the 7-Zip utility . While the name contains a small typo ("Minceaft" instead of "Minecraft"), it follows the standard practice of using high-ratio compression to protect large game files from corruption or data loss. What is inside Minceaftbackup.7z?
If it's a server backup, it may also include plugins, configuration files, and logs. How to Use and Restore the File The world should now appear in your single-player menu
Right-click the .7z file and choose "Extract Here" or "Extract to [Folder Name]" using 7-Zip. Locate your "Saves" Folder:
Critical metadata that determines the world seed and game settings. While the name contains a small typo ("Minceaft"
Inventory contents, XP levels, and spawn points for all players.