What Jessi said, but basically you need a space agreement or space contract to unlock the 2 slots and the stock keeper for 30 days and you can add stuff in there. If past the 30 days limit, it will still be there but if you take it out, you cannot put it back in. It does not mean you have unlimited space though because you can use up the 2 slots and stock keeper and all the other room but the contract will not give you more room.