Hey guys, I need some help.

I'm level 46 and I'm doing the main quest: Reunions. Encountered no major bugs until when Im in the part that I should follow dogmeat to Kellog's trail from Diamond city. I can save my games normally until the point where I exit diamond city (via the entrance or fast travel); when I exit the quicksave and autosave are fine but I can't manually save my game (overwrite or new save) as it says "There is not enough free space in system storage. To continue using the application, you must free up at least 10.52 mb more space", which is weird because when I check, I have 400 GB of storage left. Freeing space (deleting FO4 saves) or restarting the console does not help. Reloading to previous points in the game makes the save work again but when I reach this point, I can't manually save again.

Appreciate some insight in my situation. Thank you.