Smo-(rf)-nswtch-update-nsp-ziperto.rar -

: This is the file format (Nintendo Submission Package). It is the standard format used for digital content on the Switch, similar to how an .exe works for Windows or an .apk for Android.

: This is the "tag" of the source or uploader, a well-known site in the niche community that archives and shares Switch software. Context and Use Files like this are primarily used by two groups:

Users with "jailbroken" or modified Nintendo Switch hardware who manually install updates to keep their games current without connecting to official servers.