It's interesting Arc doesn't have any kind of dimensional storage (pocket dimension) like most fantasy games offer to the player, even if it's sometimes superficially masked as a backpack or something. Typically the weight and amount is a lot more than a human should be able to carry or jam into a packback. Quite a few games don't even bother with a backpack, only having a weight limit, whereas some might supposedly have a backpack, or other bags, that can be upgraded, but they can still take in a mountain of stuff and might be invisible in the game.