: This is the file extension for Nintendo Switch digital packages. It stands for "Nintendo Submission Package."

: A compressed file format. You will need a program like WinRAR or 7-Zip to "extract" the NSP file from inside this archive before it can be used. Context & Usage

: Indicates the source of the file was the official Nintendo digital storefront.

: Downloading NSP files for games you do not own is generally considered a violation of copyright laws and Nintendo's Terms of Service.