"USB 3.0 External 2.5" SATA HDD Enclosure - ElecGear Aluminum Caddy Case for Large 2, 5 "HDD SSD" This is how this case is advertised. In fact, the case is made of plastic and only the cover is made of metal. So if you're looking for better cooling for your hard drive or SSD, look elsewhere. The HDD or SSD is held in place by a SATA connector and foam pads (my case had the pads already glued to the plastic case, so you need to remove the interface board, connect the HD/SSD to the SATA connector and press then put it in the case. At this point I stopped the assembly and decided to return the case. I have experience with these rubber pads. They tend to shrink and after that the rubber pads do nothing. When this happens, the HD/SSD just becomes supported by sata port and can lose connection, this happened to me in another case and my 120gb ssd got corrupted costing $27.