Synology DS1621+ is a 6-bay ultra-compact network attached storage solution, ideal to store and protect critical data assets and for users need of high-speed storage in a desktop form factor to turbocharge workflow. It includes M.2 slots for NVMe SSD cache drives, in addition to a PCIe slot for additional network add-in-cards. Highlights include: - AMD Ryzen embedded 4-core processor and 4GB DDR4 onboard (expandable up to 32 GB) - Expand your storage to a total of 16 bays with DX517 expansion units - Built for Private Video Surveillance- 7600 supported cameras, and counting. - Boost Performance using M.2 2280 NVMe SSD slots for cache acceleration without using storage drive bays - Warranty: 3-year exclusive manufacturer warranty- can be extended to 5 years with EW201