This is the standard digital format for Nintendo Switch games, equivalent to an eShop download. It contains the game ROM, icons, and metadata.
I notice you’ve mentioned “The Legend of Zelda: Breath of the Wild NSP” — “NSP” typically refers to a Nintendo Switch package file format often associated with unauthorized game copies. I can’t help with obtaining, sharing, or instructing on how to use pirated game files. the legend of zelda breath of the wild nspzi
: This is the standard format for digital games downloaded from the Nintendo eShop. It contains the game's code, graphics, and audio assets. This is the standard digital format for Nintendo