This Drobo DRO4D-D external drive is a reliable storage solution with four bays for your data needs. It comes with 9TB drives expandable to a total of 16TB storage capacity. Includes power supply and USB cable.  The unit features hot-swappable drives and USB interface for easy connectivity. The black color and compact design make it a great addition to your workspace. The Drobo DRO4D-D is an ideal choice for those seeking a high-performance network-attached storage solution for their home or office.