Medium storage units can be built in resource rooms within the Chambers of Xeric. It allows players to store 500 items that are found only within the Chambers, and 60 of the player’s personal items.
It can be either built by upgrading an existing Small storage unit or built from scratch; the former requiring 2 planks, and the latter 4.
NOTE: Players who leave the Chambers with their personal items still stored in the storage units can retreive them from the private storage unit next to the bank chest on the Mountain. The private storage unit must be emptied before players re-enter the Chambers of Xeric.