Thanks If you have 2 USB keys, back up your solo save on one key when done playing, then back up the save when you're done playing together to another. Then overwrite your PS4 system save with your USB one when situation changes. (Don't forget to backup everytime you're done). It's not the best answer but it does work: if you have the hidden ForAssassin's Creed Origins: The Trials of the Gods on the PlayStation 4, a GameFAQs Q&A question titled "How do I recovered deleted save game from assassin creed origins xbox one s?". .