This is a compressed archive format. To use the game, the .nsp file must be extracted from the .rar first. Risks and Safety Concerns
The safest and only legal way to play Minecraft on the Nintendo Switch is to purchase it through official channels: Download Minecraft [0100D71004694800][v4259840][US] nsp rar
Downloading .nsp files from unofficial third-party sites is generally unsafe and highly discouraged for the following reasons: This is a compressed archive format