: Use a homebrew installer like Tinfoil , DBI , or Awoo Installer .
: Use a tool like 7-Zip or WinRAR to extract the .nsp from the .rar . Transfer : Move the file to your Switch's SD card. UNO [0100B6E012EBE800][v524288][US].nsp.rar
💡 : If you are trying to play with friends, ensure everyone is on the same version number ( v524288 ), as local wireless play often requires matching updates. If you tell me more, I can help with: Homebrew installation guides Troubleshooting "corrupted data" errors Updating your Switch firmware safely : Use a homebrew installer like Tinfoil ,
: Running .nsp files requires a "Custom Firmware" (CFW) such as Atmosphère . How to Use This File UNO [0100B6E012EBE800][v524288][US].nsp.rar