I need help because my saves are corrupting most of the time, usually with overwrite and auto saves. I have even gotten rid of several old saves hoping free up memory would help but it does not. can anyone help me thank you?

You answered your own question. Do not overwrite old saves and do not load auto saves. Always make a new save every time. If you want to load another save while in game then close the game, restart, then load that save.