Synology RackStation RS819 is a budget friendly, compact and scalable 4-Bay, 1U rackmount NAS and is an ideal choice for remote office or small business with limited office space; sliding rail kit is included for easy server installation. RTD1296 4-Core 1.4GHz CPU; 2GB DDR4 non-ECC Memory; 16TB (4 x 4TB) SATA 2.5' SSDs for Ultra-Fast Storage; 2 x RJ-45 1GbE LAN Ports (with Link Aggregation / Failover support); 2 x USB 3.2 Ports; 1 x eSATA Port; Btrfs File System for Advanced LUN iSCSI Service Features: Backup with Snapshot Replication Technology Support, Near Unlimited File Management and Sharing, Digital Asset Protection, File Access and Sharing via QuickConnect, Comprehensive Built-In Security Tools, and Public Cloud Integrations Synology NAS chassis comes in a sealed box. Hard drives and memory upgrades included separately, NOT installed, installation required.