DiskStation Quad Core 4 Bay NAS (Synology DS420+) - Intel Celeron J4025 Processor (2.0GHz, 2 cores), 2 GB DDR4 non-ECC (1 x 6GB, 1 slots free, 6GB Max), 180 TB, 4 Hard Drive Bays, No Optical Drive, 2 x GbE LAN, Connectivity: 2 x USB3.0, 90W Power Supply, No Operating System