Qnap NAS 4GB, TS-453D-4G; Drive Bay: Hot-swappable 4 x 3.5-inch SATA 6Gb/s, 3Gb/s; CPU: Intel® Celeron® J4125 quad-core 2.0 GHz processor (burst up to 2.7 GHz); System Memory: 4 GB SO-DIMM DDR4 (1 x 4 GB); Maximum Memory: 8 GB (2 x 4 GB); 2x 2.5 Gigabit Ethernet Port, 1 x PCIe, 3x USB 2.0, 2x USB 3.2 gen1, 1x HDMI.