Sure, you can already add storage to your Raspberry Pi, but it's usually an exercise in trade-offs: SD cards don't hold much data, and USB drives (even the portable ones) tend to be too big and power-hungry for a mini PC. WD doesn't think you should have to compromise, though. It's shipping a new PiDrive that stuffs 314GB into a slim design that won't overwhelm the Pi's power system, but is fast enough to make full use of the USB connection. It even has a special version of BerryBoot (a multi-operating system tool) to help you load your platform of choice and fill that abundant space with apps.
Via: Western Digital (PR Newswire)
Source: WD PiDrive (US), (UK)