Digital eShop format used for installing base games, updates, and DLC directly to your console storage or SD card.

Connect your console to your computer using a high-quality USB-C data cable.

: Stands for Nintendo Submission Package. It's essentially a file format used by Nintendo for digital distribution of games through the Nintendo eShop. When you purchase a game digitally on the Switch, it downloads in NSP format.

Madrid Drive (Tour), Rosalina’s Ice World (3DS), Bowser Castle 3 (SNES), Rainbow Road (Wii). Understanding NSP/XCI and Update 3.0.0

A key part of the "mario kart 8 deluxe switch nsp xci" part of your search is understanding these two file types. They are essentially two different ways to package a Switch game.

For users running custom firmware on their Nintendo Switch, updating is a critical process. What are NSP and XCI?