Eisen was looking at the different items that he had in the item storage before. Different weapons or tools that he made out of boredom or for practice, as well as pieces of clothing or armor made for the same purpose. These would take up an incredible amount of space, as far as Eisen was concerned. It was harder to store these in the same way as Eisen stored the other items, although in the end, he probably didn't need to store this kind of item that much.
Instead, Eisen should probably start putting these into the portable shop. Since any item inside of there is also stored when the shop is closed down, that would save Eisen a lot of space. And it wasn't like he needed these sorts of items ever anyway.
