: Stands for Nintendo Submission Package . These are digital installation packages, similar to files found on the Nintendo eShop, used for installing games, updates, or DLC .
The file is a specific volume of a multi-part compressed archive containing a Nintendo Switch game or application in NSP format. File Breakdown A-(RF)-NSWTCH-NSP-ZIPERTO.part2.rar
: Likely an internal release tag or identifier from the uploader/group. : Stands for Nintendo Submission Package