Synology RackStation RS2421+, 2U 12-bay rackmount NAS with cost-effective file management, sharing, and backup capabilities, specially designed for small business and remote office deployments. Powered by Synology's DiskStation Manager (DSM), RS2421+ units come with powerful built-in business services and can easily be expanded with SSD cache and 10/25GbE networking capabilities. Synology RS2421+ is backed by Synology's 3-year limited warranty. 5 year warranty is available as an optional bundle with EW202, 2-year Extended Warranty service add-on. Synology Live Chat available - https://www.synology.com/en-global