refers to a Nintendo Submission Package, the official format for digital games on the Switch eShop. Downloading these from third-party sources is considered copyright infringement and is strictly prohibited by Nintendo's terms of service. Security Hazards:

NSP files are a format used by the Nintendo Switch for its games and applications, similar to how digital games are distributed on the eShop. The term "homebrew" refers to software that is not officially supported or endorsed by the platform's manufacturer but is created by enthusiasts or third-party developers.