My Cloud Mirror personal cloud storage. Save everything in one place with twice the protection and access it from anywhere; Two-bay enclosure, 4 TB; Free mobile and desktop apps; Gigabit Ethernet; PC/Mac compatible; Mirror Mode (RAID 1 - default mode), RAID 0, JBOD, spanning; DLNA 1.5 & UPnP certified; 1.2 GHz processor; 512 MB memory; Dual USB 3.0 expansion ports; iTunes support; Auto network discovery.