Key features plug n use design for seamless storage space upgrade redundant data paths amp power supplies ensure service uptime sata and sas drives for flexible capacity and balanced performance managed with synology diskstation manager dsm backed with synologys 5 year limited warranty when storage capacity on the synology rs18016xs reaches its limit synology rx1216sas provides an easy way to immediately scale up by additional 12 sata or sas drives for flexibility and balanced perform