Synology RackStation RS1619xs+, made for a variety of server roles such as iSCSI targets backup, virtualization, file storage, email servers, and domain controllers; sliding rail kit is included for effortless server installation. Xeon D-1527 Quad-Core 2.2GHz CPU, Up to 2.7GHz Turbo; 64GB DDR4 ECC UDIMM Memory; M.2 Storage: 1TB (2 x 500GB) M.2 Solid State Drives for Ultra-Fast Storage; 40TB (4 x 10TB) SATA 3.5' HDDs for High-Capacity Storage; 4 x RJ-45 1GbE LAN Ports (with Link Aggregation / Failover support); 2 x USB 3.2 Ports; 1 x Expansion Port; Btrfs File System for Advanced LUN iSCSI Service Operating System: Synology DSM Software Synology NAS chassis comes in a sealed box. Hard drives and memory upgrades included separately, NOT installed, installation required.