Storage mid range

Synology RackStation RS819, Rack 1U, 4-bays 3.5” SATA HDD/SSD; 4-core 1.4 GHz; 2 GB DDR4 non-ECC; 2x RJ-45 1GbE LAN Port; 2x USB 3.0; eSATA port; 4.34 kg; 3yr warrantyRS819

Synology RackStation RS820+ 4-Bay, 3.5″ HDD or 2.5″ HDD/SSD, 4 x 1Gbe LAN(with Link Aggregation/Failover support), 2xUSB 3.0,1 x eSata, 1xGen3 x8 PCIe, Hot Swappable Drive, Power Recovery, Wake on LAN/WAN,Scheduled Power On/OffRS820PLUS

Synology RackStation RS1219+; Rack 2U, 8-bay 3.5” SATA HDD/SSD, 4-core 2.4GHz; 2GB DDR3 non-ECC, 4x RJ-45 1GbE LAN Port; 2xUSB 3.0; eSATA port; PCI Gen2x8 slot (x4 link); 6.9 kg; 3yr wrntyRS1219PLUS

Synology RackStation RS820RP+, Rack 1U, 4-bays 3.5” SATA HDD/SSD; Intel Atom C35384-core 1.4 GHz; 2 GB DDR4 non-ECC; 4x RJ-45 1GbE LAN Port; 2x USB 3.0; PCIe Gen3- Card/M2D18; 150w Redundant; 3yr warrantyRS820RPPLUS