WD is offering 314GB PIdrive specially designed for raspberry pi 3 B/ 2 B.

http://arstechnica.co.uk/gadgets/2016/03/wd-314gb-raspberry-pi-pidrive/


I checked offical Western Digital store and there is HDD enclosure that fits under official Raspberry PI case. This might be useful to everyone who plan to run ROKOS bitcoin full node.