Recently I helped a photographer to backup a large photo collection (several terabytes) from a Western Digital (WD) personal NAS MyBook Live. The My Book Live Edition NAS was released by Western Digital in 2011. They range in storage capacity from 1 to 4 TB. My Book Live features a 1 GHz ARM processor, 256 MB of RAM, and 1000 Mbit/s ethernet connectivity. Contrary to previous My Book Live versions it now features a fully fledged Debian linux distribution , whichs makes the My Book Live easy to customize and adapt to different needs.