Backuping save game files.

Sup, everyone.

I’m needing to restore my W10 and I would like to do a backup from my saved game to avoid maybe getting this file also restored in the process and losing my progression.
Anyone knows where is it or how to do it? I saw on Google that, if you have a newer saved game on the cloud and open a game with a previously one, the laucher will ask if you wants to replace it or not. But I rather do the backup myself, just in case.