Websites and forums discussing NSP files and game mods may share links or instructions on how to obtain or create these files. However, due to the illegal nature of sharing copyrighted content without permission, such information is usually shared discreetly and can be risky to access.
Downloading NSP files for games you haven't purchased can violate Nintendo's terms of service and copyright laws. NSP files are often discussed in the context of the Switch homebrew and ROM hacking communities. mario kart 8 update nsp