The RackStation RS819 4-Bay NAS Enclosure from Synology brings business workgroups simple, comprehensive solutions to data management, sharing, synchronization, and backup. This RackStation sports four bays that can accommodate your 3.5" and 2.5" SATA hard drives and SSDs. To manage the data, DSM operating system, and apps, Synology has armed this NAS with a 1.4 GHz Realtek RTD1296 Quad-Core processor, as well as 2GB of DDR4 RAM. It features a 1 RU form factor and connects to your network via two Gigabit Ethernet ports. For uninterruptible services, the networking ports offer failover and link-aggregation support. Other notable connections include one eSATA port and two USB 3.0 Type-A ports, so you can expand the RS819's capabilities with external storage drives, printers, and more. In addition, it lets you configure the drives in a RAID array, set up iSCSI LUNs, and encrypt the data using the AES-NI hardware encryption engine. This NAS supports a single volume size of up to 108TB.