Nino-knirk-pe-nswtch-[base]-nsp-ziperto.part1.rar -
Indicates this is the base game file, not an update or DLC.
The file format (Nintendo Submission Package) used for installing games on modified consoles or emulators. NINO-KNIRK-PE-NSwTcH-[BASE]-NSP-Ziperto.part1.rar
Because this is labeled "part1", you will need all subsequent parts (part2, part3, etc.) located on the same site to extract the file correctly. Indicates this is the base game file, not an update or DLC
Use software like WinRAR or 7-Zip to extract the contents. You only need to extract part1 , and it will automatically pull from the other parts. NINO-KNIRK-PE-NSwTcH-[BASE]-NSP-Ziperto.part1.rar
Represents the game title, which appears to be NinoKuni (Ni no Kuni) for the Nintendo Switch.
Ziperto is a known repository for Switch NSP/XCI files.