Synology RackStation RS822+ is a 4-bay rackmount NAS enclosed in a compact 1U chassis. Running the powerful Synology DiskStation Manager (DSM) operating system, it is ideal for data backup, sharing, and synchronization. Its small size, stable performance, and storage scalability makes it suitable for branch offices and small and medium-sized businesses with ever increasing data management needs.Synology RS822+/RS822RP+ is backed by Synology's 3-year limited warranty5-year warranty is available as an optional add-on with EW202, a 2-year warranty extension.