where’s my other saves?

hey, i downloaded mods for the first time awhile back in the middle of my playthrough. i’m now pretty far in the playthrough with mods but i wanna go back to my save before i installed them, i made the game way too easy and i want to unlock achievements again. when i go to settings > load > scroll all the way down all of the saves still have the (M) on the side and it’s not far enough back. how can i go back at this point? help!