The copies made by the game will be overwritten every 10 or so minutes that you have the game open, and if you closed it 2-3 days ago it saves that information and calculates how much time you were gone in both the original save files and the backups so this is not good.

If you had a backup from 2-3 days ago that you saved for yourself elsewhere, you could've used this to return to the state they were in 2-3 days ago.