QNAP (TS-351-4G) – TS-351-4G / TS-351-4G 3-Bay NAS | Intel Celeron J1800 2.41 GHz Dual Core (burst up to 2.58 GHz) RAM: 4GB DDR3L RAM | MAX RAM: 8GB DDR3L RAM | 512MB DOM Internal Storage: 2 x 3.5″ SATA 3G + 1 x 3.5″ SATA 6G | Hotswap | 2 x M.2 NVMe Gen2 x1 Slots External Ports: 1 x USB3.0, 2 x USB2.0, One Touch Copy Button | 1 x HDMI 1.4a GPU: Intel HD Graphics, Support 1080P H264 Audio Out: 1 x 3.5mm / Built-In Speaker GbE Ports: 1 x GbE (RJ45) OS: QTS | File System: EXT4 | RAID Level: RAID 0, 1, 5, JBOD | Support QTier™ Auto Tiering Expansion Units: 8 x VJBOD units Surveillance Station: 2 x IP Cam Licenses (up to 32) / QVR Pro: 8 x IP Cam Licenses 2 Years Carry-In Warranty (Optional: Upgrade to 5 Years Carry-In / Onsite Warranty)