: This stands for Nintendo Submission Package . It is a native digital file format used by the Nintendo Switch for eShop games, updates, and downloadable content (DLC).
Connect your console to the internet, navigate to the game's icon on your home screen, press the + or - button, and select "Software Update" -> "Via the Internet". This automatically and securely downloads authorized game files directly from Nintendo. DEDCELS-(USA)-NSwTcH-NSP-Update1221-Ziperto.rar
If you are playing offline with someone else who has a newer version of the game, you can use the local wireless feature on your Switch to match their update version. Nintendo Switch DLC & Updates January 2023 - Ziperto : This stands for Nintendo Submission Package