This is the standard file format for Nintendo Switch digital games (Nintendo Submission Package).
The game itself is relatively small (around 1-2 GB), but ensure you have enough space on your SD card or drive after extraction. Elderand (NSP)(eShop).rar
This indicates the file was sourced from the digital Nintendo eShop rather than a physical cartridge dump (which would typically be an .XCI file). This is the standard file format for Nintendo
These files are generally used with Nintendo Switch emulators (like Ryujinx) or on "custom firmware" (CFW) modified consoles. These files are generally used with Nintendo Switch
The game is currently compressed. You would need a tool like WinRAR or 7-Zip to extract the actual .nsp file inside. Important Considerations
Be cautious when handling .rar files from unofficial sources, as they can sometimes contain malware. It is always safest to purchase and download the game directly from the Official Nintendo Store.