: This is a file format used for Nintendo Switch digital software packages. These files are typically used with custom firmware or emulators.

The .NSP and .rar extensions in your query indicate a digital backup file often used with emulators or modified consoles. If you are looking for instructions on how to apply this update to your game files, you typically need to use tools like or DBI to install the NSP update over your base game.

Always ensure you own the game legally before applying updates through third-party tools or emulators. How To Install Updates On Ryujinx & Downgrade As WELL!!

: In your emulator, go to File -> Install Files to NAND and select your legally obtained .nsp update file.