WDBNFA0400KBK-NESN WD My Cloud Pro Series PR4100 Media Server with Transcoding, NAS - Network Attached Storage - Intel Pentium N3710 Quad-core (4 Core) 1.60 GHz - 4 x Total Bays - 40 TB HDD - 4 GB RAM DDR3L SDRAM - RAID Supported 0, 1, 5, 10, Concatenation, JBOD - Gigabit Ethernet - Network (RJ-45) - 3 x USB Ports - 3 USB 3.0 Port(s) - My Cloud OS 3: