Files with this naming convention are typically found on third-party file-sharing sites rather than official storefronts.

This indicates the file has been further compressed into a RAR archive, likely for easier distribution or storage. You would need software like WinRAR or 7-Zip to extract the actual .nsp file. Safety and Usage Warning

.nsp files are generally installed on modified (homebrew) Nintendo Switch consoles or used with PC emulators like Yuzu or Ryujinx .