Smurfkart-(usa)-nswtch-nsp-update1010-ziperto.rar -

: You would use a custom firmware (CFW) like Atmosphère and an installer (such as Tinfoil or DBI) to install the .nsp file onto your console.

To actually play the game or apply the update, you generally need one of the following setups: SMURFKART-(USA)-NSwTcH-NSP-Update1010-Ziperto.rar

: This is the name of the website where the file was likely hosted. : You would use a custom firmware (CFW)

: This is the file format (Nintendo Submission Package). It is the standard format used for digital games and updates on the Switch. SMURFKART-(USA)-NSwTcH-NSP-Update1010-Ziperto.rar