Synology RackStation 2-Bay (Diskless) 1U NAS Rackmount Network Attached Storage RS212 (Black) CPU: 1.6GHz Memory: DDR3 256MB Internal HDD/SSD: 2x 3.5" or 2.5" SATA2 (Hard drive not included) Max Internal Capacity: 8TB (2x 4TB HDD)(Capacity may vary by RAID types) External HDD Interface: 2x USB 2.0 ports, 1x eSATA Port LAN: 2x Gigabit