Synology RX1213sas delivers an effortless storage capacity expansion solution for Synology Rack Station RS10613xs+ by adding 12 drives on-the-fly while directly connected. Contains the WD Red HDD’s with WD’s NASware technology for enhanced efficiency, reliability & compatibility Storage Capacity Expansion When storage capacity on the Synology RS10613xs+ reaches its limit, Synology RX1213sas provides an easy way to immediately scale up by additional 12 SATA, SAS, or SSD drives for flexibility & balanced performance. Volumes on the Synology RS10613xs+ can be expanded directly without having to reformat existing drives, ensuring that service on Synology RS10613xs+ continues during capacity expansion. Created as an independent volume, Synology RX1213sas provides an easy means of backing up Synology RS10613xs+. Reliable Plug-n-Use Design The Synology RS10613xs+ securely connects to the Synology RX1213sas through dual SAS cables to ensure maximum throughput & connection redundancy. Drives in the connected Synology RX1213sas can operate as though they were internal to Synology RS10613xs+, with no data–retrieval lag. Redundant power supplies also ensure continual service uptime. Synology RX1213sas is managed by Synology Disk Station Manager, with no additional software installation required.