Since the file ends in .rar , you first need to extract its contents on your computer. Use a tool like 7-Zip or WinRAR.
On your PC, the Switch will appear as a drive. Open the drive and find the or "NAND Install" folder.
Are you planning to install this on a or are you using an emulator like Ryujinx or Yuzu? GASTATIONSIM-(USA)-NSwTcH-[BASE]-NSP-Ziperto.rar
Right-click the file and select "Extract Here." This should produce a file with a .NSP extension (the actual game data). 2. Installation Methods
This is often faster as it skips the step of copying files to the SD card first. Connect your Switch to your PC via a USB-C cable. Open on your Switch and select "Run MTP Responder." Since the file ends in
Drag and drop your .nsp file directly into that folder; the app will handle the installation automatically.
The [BASE] tag in your filename means this is the core game. You may need to find and install a separate "Update" NSP file to get the latest features or bug fixes. Open the drive and find the or "NAND Install" folder
How to Install NSP Files from SD card to the Nintendo Switch using Tinfoil!!!