Inventory Menu needs some serious work, very slow clunky, poor a lot of issues when transferring items to different storage slots,
Need to introduce similar to PC menu, where you click and drag items to where required, if you could add once you enter Inventory menu screen that a cursor appears which can be navigated around the entire screen where you can then click items to add to hands, or you can drag them to place them in a materials slot, or another bag for example.
Of course not sure if this is planned in next updates etc... but hope this is coming soon as would make the gameplay a lot smoother.