WD Red Plus NAS Hard Drive WD140EFGX – Hard drive – 14 TB – internal – 3.5 – SATA 6Gb/s – 7200 rpm

WD Purple Pro WD141PURP – Hard drive – 14 TB – internal – 3.5 – SATA 6Gb/s – 7200 rpm – buffer: 512

WD Gold Enterprise-Class Hard Drive WD181KRYZ – hard drive – 18 TB – SATA 6Gb/s