Built for High-Speed Connectivity - Combine built-in 10GbE and optional high-speed NIC for over 3,100 MB/s sequential read performance Boost Performance With SSD Cache - Built-in M.2 2280 NVMe SSD slots permit cache acceleration without using storage drive bays Flexibly Expand Storage Size - Flexibly scale up to 16 drives to increase storage capacity as demand grows Collaboration and Productivity Suite - Build an on-premises, multi-user collaboration environment with fine-grained controls Protect and Restore Data in a Snap - Back up critical data and reduce your Recovery Time Objective (RTO) with Snapshot Replication Synology DiskStation DS1621xs+ is a high-end, high-performance NAS solution that supports every aspect of your business with powerful data management, collaboration, and networking tools topped off with well-rounded data protection mechanisms in a 6-bay desktop chassis. Built-in M.2 SSD cache slots, 10GbE connectivity, scalable storage, and Synology 5-year limited warranty make DS1621xs+ a future-proof choice to build on-premises cloud infrastructure.