OWC Envoy Pro Aluminium USB powered

Ultra-portable, bus-powered external storage solution designed to complement the MacBook Pro with Retina display
The OWC Envoy Pro combines elegance and functionality into a sleek, portable external storage solution that complements the design and finish of the MacBook® Pro with Retina display. Its aluminum body protects your drive and data, while its minimal size allows for simple stowing in coat pockets, backpacks or briefcases.

The USB 3.0 interface offers speedy transfer rates of up to 500MB/s and the Envoy Pro requires no AC power adapter making it the ideal Plug and Play USB bus-powered solution.