: Copy the file to your microSD card. Open your chosen installer (e.g., Goldleaf) on the Switch, browse to the file, and select Install . Note: Files larger than 4GB require a FAT32-formatted card to be split or installed via USB.
: Connect your Switch to a PC via USB. Using the DBI Installer , select "Run MTP Responder." Drag the extracted .nsp file into the "SD Card Install" or "NAND Install" folder that appears on your PC.
: Use a trusted homebrew installer such as DBI , Tinfoil , or Goldleaf . Choose an Installation Method : Valis IV [010070F01901C000][v0][JP].nsp.rar
You can also play this file on a PC using Nintendo Switch emulators like Ryujinx. from the .rar archive.
: It is highly recommended to use backups only of games you own legally. Installing unofficial software or pirated content can lead to a console ban from Nintendo's online services. : Copy the file to your microSD card
: Go to File > Load File and select your extracted .nsp file, or set a "Game Directory" in the settings to have it appear in your library automatically.
and ensure you have the latest Firmware and Production Keys installed. : Connect your Switch to a PC via USB
: Right-click the .rar file and select "Extract" to get the .nsp file.