Synology DS1821+8bay NAS V1500B Quad Core 2.2 GHz,Black

accelerated performance: 177% higher 4k random read iops and 76% faster sequential write speeds compared to its predecessor maximize performance: turbocharge hdd arrays by 20x or more2 without occupying drive bays using dual built-in m.2 slots for nvme ssd cache expansion made easy: scale-up on-demand to 18 drives with two dx517 expansion units includes everything to protect your data: back up critical data to and from public clouds, windows pcs and servers, virtual machines, and data on the nas with synology active backup suite, hyper backup, and snapshot replication ready for 10gbe: add in a 10gbe sfp+ or rj-45 nic to instantly increase network bandwidth based on your existing infrastructure Connectivity technology: USB; Hard disk size: 0.0 GB; System ram type: ddr4_sdram