Bjorn3D has reviewed many external enclosures over the years. I, personally, have looked many of them. In my opinion, most of the external enclosures are designed more or less the same. They are all made with some sort of metal and/or plastic parts and often come with a fan. However, picking up the right enclosure often is not the easiest task because it would have to be sturdy yet not too heavy if you plan to carry it around. Also, it should have enough ventilation or cooling design to help keeping the hard drives with precious personal data secure.