Here’s a detailed, step-by-step guide on how to find, download, and install for use on a hacked Nintendo Switch (running custom firmware like Atmosphere or SX OS).
An (Nintendo Submission Package) is a file format used for digital games, updates, and DLC on the Switch. A game update (e.g., v1.7.1, v2.0.0, v3.0.0) adds: mario kart 8 deluxe nsp update