Cant use my save because its tampered but its not. PLZ HELP ASAP

I have my save file on a USB and i have never modded anything on the save because a friend told me what happened to him when he did that and i have not modded my game in any way and i stay very far away from mods that make the game easier ive tried to to start it from the hard drive doesn’t work and i’m NOT DELETING MY SAVE because im on the last series and it has taken me forever to get that far and i really dont want to do it again. Plz help

Did you “move” or “copy” the save to the USB? If you copied it it has flagged the anti-cheat mechanism and is probably no good now.

Very sad but very true. Also before you delete anything if you haven’t done ^^^^ go you your save and look for anything with a caution symbol next to it as you may just have a corrupt file.