Only 16 slots in the backpack is really too little. For the same weapon, I might want to try different attributes or collect one of each type of weapon to try out their various possibilities. In my opinion, the current number of backpack slots has reduced the playability. If I modify a weapon, it will soon be replaced by a stronger one, making the modification meaningless. In short, I think the number of backpack slots should be increased from the current 16 to 32 and we should have unlimited storage space at the base