Synology DiskStation 8-Bay Diskless Network Attached Storage (DS1813+) Four LAN Ports with Link Aggregation Support. Expandable RAM Module (Up to 4GB). CPU Passive Cooling Technology and System Fan Redundancy. High Availability and Automatic Failover by SHA. VMware, Citrix, Microsoft Hyper-V Ready. Scale up to 72TB with Synology DX513. Powered by Synology DiskStation Manager (DSM).