Gastationsim-(usa)-nswtch-[base]-nsp-ziperto.rar

Be aware that downloading games from unauthorized sources like Ziperto is considered copyright infringement.

On your PC, the Switch will appear as a drive. Open the drive and find the or "NAND Install" folder. GASTATIONSIM-(USA)-NSwTcH-[BASE]-NSP-Ziperto.rar

Drag and drop your .nsp file directly into that folder; the app will handle the installation automatically. Be aware that downloading games from unauthorized sources

Since the file ends in .rar , you first need to extract its contents on your computer. Use a tool like 7-Zip or WinRAR. GASTATIONSIM-(USA)-NSwTcH-[BASE]-NSP-Ziperto.rar

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.