DiskStation Quad Core 4 Bay NAS (Synology DS920+) -Intel Celeron J4125 Processor (2.0GHz, 4 cores), 4 GB DDR4 non-ECC (1 x 8GB, 1 slots free, 8GB Max), 180 TB, 4 Hard Drive Bays up to 9-bay, No Optical Drive, 2 x GbE LAN, Connectivity: 2 x USB3.0, 1x eSATA Port, 100W Power Supply, No Operating System