You can find the game's save path here

Steam: C:\Users\your user here\AppData\LocalLow\Nomada\Twelve Minutes

Microsoft Store: C:\Users\username\AppData\Local\Packages\AnnapurnaInteractive.TwelveMinutes_c96c51jf6wkvm\SystemAppData\wgs\

Then you'll see your PC's username.savegame for instance mine is lazer.savegame

To use a save make sure to change the name of the file to be your PC's username.savegame then restart your game. You'll load into the game as if you just started the game in that loop.

You can also use this to back up saves.