Knowing this helps:

If you’ve ever dug into the file structure of your Nintendo Switch, used a save manager, or explored emulation, you’ve likely come across strings like:

This 16-character hexadecimal string is unique to Mario Kart 8 Deluxe . It is used by the console to manage save data, updates, and DLC compatibility.

Even if you aren't a pro, the latest versions have changed how you play:

: Tools like Tinfoil or Cheat Slips use these IDs to ensure that a mod or cheat code (like increasing the gold coin limit to 1,000) matches the exact version of the game you have installed.

If you have downloaded a file with this name or are looking at a specific update patch, here is the technical breakdown: