The problem isn't coding a bigger vault. The problem is the amount of memory on the older consoles. When you load into the tower you load everything in the tower for example, all vendor items, all valt item, all post master items, elc. Thats why when you scroll over an item tge stats show right away. The old consoles don't have the memory to store all of that. Thats part of the reaaon why bungie made a new social space for HoW so they don't add 3 new venders to the tower. When I'm talking about menory I am talkin about memory I mean system Ram not hard drive space.