DiskStation Quad Core 2 Bay NAS (Synology DS720+) - Intel Celeron J4125 Processor (2.0GHz, 4 cores), 2 GB DDR4 non-ECC (1 x 6GB, 1 slots free, 6GB Max), 180 TB, 2 Hard Drive Bays up to 7-bay, No Optical Drive, 2 x GbE LAN, Connectivity: 2 x USB3.0, 1x eSATA Port, 65W Power Supply, No Operating System