Disclaimer: have not played in a few years. So this answer is only true for a state of game from before the mists update

You will have a lot of chests with a lot of stuff. Inventory management is part of the game. You can not carry metal (heavy and important) through portals and are forced to transport them yourself. You will have limited inventory space. You will basically move through tiers of materials (woods, metals etc), but low tier materials will never be obsolete, so you need to store a lot.

That being said: it is all worth it. Your stuff can be destroyed you drop your stuff on death and it makes moving through dangerous parts of the map a lot more exciting and challenging.