This is a big one, and I think probably would have some hurdles, but it would amazing if there was a way to backup a campaign - including the character handouts, maps, and any art from your library used. It is painful when you have run many campaigns and don't want to erase old ones you want to go back to some day and there's no way to archive them to bring them back later, but want to clear the space for now. Anyway, I think this would be an outstanding feature to offer perhaps even on a paid tier that I suspect would be welcome by all.