The .nsp.rar extension indicates that this is a digital game package ( .nsp ) compressed into a RAR archive, typically used for or for installation on a modded console. Key Game Details
The extracted .nsp can also be loaded into PC-based emulators like Yuzu or Ryujinx . SD Valis [01000C001901E000][v0][JP].nsp.rar
Use a homebrew tool like DBI or Goldleaf to transfer the file to the console via USB or SD card. SD Valis [01000C001901E000][v0][JP].nsp.rar