Glad to know the maximum is 20 items, but I am getting close on all my characters. Just make sure you have at least one weapon and armor space in your vault so you can move an item if necessary, especially if it is just for a second so you can pick something up to delete it. My post master makes as a makeshift vault only for legendary and exotic items, rare items get dismantled every time I go to the tower. I hope we get more vault space on Tuesday.