Synology DiskStation DS1621+ is a powerful 6-bay network-attached storage solution designed to store and protect critical data. The growing amount of unstructured data requires smarter and increasingly better-performing methods of storage, access and sharing. DS1621+ is a compact desktop form factor NAS that is not evolutionary, with over 110K, or 174% higher 4K random read IOPS, compared to its predecessor. Designed for scalability, the DS1621+ allows you to start small and then expand as your data grows.