So I wanted to have all my stuff be PC only since I keep having trouble of the companion app and other things always trying to default to my PSN account for things. Well after I turned off cross save since I figured that was a part of it it actually made it so I can't use my characters on steam at all, I thought they would have migrated or something. Now I can't get back to my characters for 90 days.
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Unfortunately there is no way to bypass the 90 day cool down. Keep in mind that cross save does not migrate your characters. Your characters are still bound to their original platform, all cross save does is allow you to access these characters from other platforms.