The standard file format for Nintendo Switch digital games/packages.
The name of a well-known website that hosts Nintendo ROMs and updates. ⚠️ Important Safety & Legal Considerations PM-MOD-RT-RF-NSwTcH-NSP-Ziperto.rar
Use a tool like 7-Zip or WinRAR to extract the .nsp file from the archive. The standard file format for Nintendo Switch digital