Best QNAP 72TB (Seagate Ironwolf) TS-855X-8G 8-Bay NAS; Intel Atom C5125 8-core/8-thread 2.8GHz processor; 8 GB UDIMM DDR4 non-ECC (1 x 8GB); 4 x UDIMM DDR4 slots with ECC supported; 6 x 2.5/3.5 SATA HDD/SSD bays + 2 x 2.5 SATA SSD bays; 2 x M.2 2280 PCIe Gen3 for Business