The My Book Thunderbolt Duo is Western Digital's first desktop drive to use an ultra-fast Thunderbolt interface. In fact, it has two such ports, so the drive and an external display can be connected to a Mac with just one by daisy-chaining the display from the drive. There are two disks inside, and WD has improved the marking and releasing of the mechanism that lets you in, should a disk need replacing.



Link: Techradar