For legitimate users, this refers to backing up purchased games. For the broader community, it is a format used with custom firmware (CFW) like Atmosphere or Ryujinx/Yuzu emulators.
Before diving into updates and DLC, we must clarify the file format. NSP stands for . It is the eShop digital distribution format for Nintendo Switch games. Unlike XCI (cartridge dumps), an NSP file mirrors the version you download directly from Nintendo’s servers. PowerWash Simulator Switch NSP UPDATE DLC