.NSP - Nintendo Submission Package (the standard format for installing games/updates on a modded Switch).
Distributing, downloading, or using game files (NSPs) that you do not own is generally illegal and against the terms of service of the Nintendo Switch. If you are asking about: KARDBRDKCSHPSIM-(USA)-NSwTcH-NSP-Update1316-Zip...
"KARDBRDKCSHPSIM" appears to be a compressed or scrambled title for a game. Update1316 - The update patch, possibly intended for
.Zip - The file is compressed, needing to be unzipped to access the .nsp file. Update1316 - The update patch
a legitimately owned game update on a modified Switch Finding a specific update for a game you own Extracting a .zip file on a specific operating system
(USA) - The content is for the North American region. Platform: NSwTcH - Nintendo Switch.
Update1316 - The update patch, possibly intended for firmware version 13.1.0 or similar.