MacRumors reports about the recent announcement by Western Digital about a very high capacity storage unit that’s connected via USB-C, called the My Book Duo. It looks like a very nicely designed unit. Out of the box, the drives are striped and thus are presented as a single volume. The maximum capacity is 20 TB.
Furthermore, the technical specifications talk about encryption, 3 year warranty and besides the USB-C port, there are two additional USB 3.0 ports. The speed is USB 3.1 gen 1, so that means 5 Gbit/s. We think that’s a bit odd; modern SSDs in a RAID-0 configuration can saturate that bus, so we’re not clear why WD didn’t choose a USB 3.1 gen 2 (10 Gbit/s) interface.
No word is said about powering a laptop with the USB-C port. The manual states that the My Book Duo gets its power from an included wall wart that can deliver up to 48 watt. That’s not enough to power both this unit and and a laptop, so that’s another missed chance.
Whether these are disadvantages to your setup, you’ll have to decide for yourself. At the moment, it seems that Western Digital focuses on the capacity as the unique selling point and rightly so; 20 TB is nothing to sneeze at.