Connect the 7-pin SATA data cable and the 15-pin SATA power cable to the device, or push the drive into the connectors on the circuit board. Put the cover back on the case. Screw the case to. An external drive enclosure is a device that basically comprises an adapter translating between the SATA standard used by the medium and an outer interface available on the computer, like USB or FireWire. Plug your new external drive into your computer. Consider various methods such as using a USB adapter cable, hacking an external HDD, building your own external HDD, using a USB docking station, installing the disk in your PC, or installing the HDD in a laptop.