The Nintendo Switch has a built-in save file management system that allows you to:

If you're looking to transfer your save file to a different Switch console, you can use the following method:

You can also trigger a save by pausing the game and choosing to quit to the main menu or the Observatory.

If you do use a save, back up your original first. And remember – playing as Luigi makes some levels easier (higher jump), but his lower traction can be tricky on ice worlds.

You're looking for information on the save file for Super Mario Galaxy on the Nintendo Switch!

Super Mario Galaxy is a fantastic game, and I'm happy to help. Since it's a popular title, I'll provide you with some general information and tips related to save files.