This is the file extension for Nintendo Switch Submission Packages, which is the format used for digital titles on the console.

A common shorthand for the Nintendo Switch platform.

While these files are central to discussions about and the ability to play backups of software you own, they also sit at the center of copyright debates. From a technical standpoint, interacting with these files requires specific custom firmware (CFW) on a console.

Often indicates "All Regions" or "Region Free," meaning the software isn't locked to a specific geographical territory.

This signifies that the original large file has been split into smaller chunks (multi-part RAR archive) to make downloading easier. You would need all subsequent parts (part2, part3, etc.) to successfully extract the content. The Ethics and Risks of "Scene" Files