Expand the network storage capacity for your small- to medium-business or SOHO (Small Office, Home Office) environment with the DiskStation DS1821 8-Bay NAS Enclosure from Synology. Useful for high-speed file sharing, backups, and surveillance, this enclosure supports up to eight 3.5" and 2.5" SATA drives in RAID 0, 1, 5, 6, 10, Synology Hybrid, and JBOD modes for up to 110,000 4K random read IOPS and 2300 MB/s sequential write speeds to handle demanding workloads. Installing up to two M.2 NVMe PCIe solid-state cache drives into the available slots can boost hard drive array performance by over 20x. In addition to having four Gigabit Ethernet ports with Link Aggregation and Failover support, the PCIe 3.0 x8 slot allows you to install expansion cards such as 10GbE network adapters to further enhance performance. The DiskStation DS1821 works with Windows 7 and macOS 10.12 or later systems, and its integrated Synology DSM operating system supports a host of applications for file management, security, and more.Designed to meet the reliability, endurance, and performance requirements of 24/7 storage in small and medium-sized business storage systems, the 16TB HAT3310 Plus Series SATA III 3.5" Internal NAS HDD from Synology delivers NAS-class reliability to ensure consistent performance in high-uptime and multi-user environments. The HAT3310 Plus has passed 500,000 hours of testing, has a Mean Time Between Failure (MTBF) rating of 1.2 million hours, a yearly workload rating of 180TB, and is filled with helium instead of regular air. Also featured is a storage capacity of 16TB, a SATA III 6 Gb/s interface, a 512MB cache, and a rotational speed of 7200 rpm, all of which help to ensure uninterrupted data transfers with sustained speeds of up to 281 MB/s.