Maxtor One Touch IV External Hard Drive - The vault like design language of the Maxtor One Touch IV Hard Drives is one that exudes security, however, the look is not just aesthetic. The fact that the drives are wider at the base doesn't just make the drives look solid and stable, but allows the PCB to be placed on the bottom. This allows for lower placement of the connectors at the back. Also, the sunken sides of the aluminum side panels allow for optimal heat dissipation by bringing the conductive aluminum closer to the drives.