This is a standard file format used for digital software, downloadable content (DLC), and game updates on the Nintendo Switch console. It mirrors the format Nintendo uses on their official eShop.
Note: Files labeled as ".rar" containing ".NSP" updates are typically associated with unofficial firmware or emulation. It is always recommended to update through the official Nintendo Support to ensure file integrity and safety. AI responses may include mistakes. Learn more How to Update Super Mario Maker 2 | Nintendo Support SUPER MARIO MAKER 2 -NSP--Update 3.0.2-.rar