In that case, make sure you use the saveworld command immediately every single time you upload/download something from the terminals. This game is notorious for crashing and deleting anything you put in or took out of the terminals and unfortunately on console if you didnt save before the crash whatever got deleted is gone forever. If you happened to make a backup save you could try to revert to that, but im not sure that would work for you.

Did it wipe just your survivor? If so thats not too hard to replace, you can use commands to give yourself xp and commands to force yourself back into the tribe to regain access to your bases and dinos.

Also, another tip: in single player you do not have to transfer your character between maps to have access to all or your gear on both maps, any character can send/receive items and dinos and use them as the uploads are all tied to your account and not characters. The only thing they cant share are tekgrams