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+.