WD Red WD30EFAX 3 TB Hard Drive – 3.5 Internal – SATA (SATA/600) – Storage System Device Supported

WD Red Plus NAS Hard Drive WD30EFZX – Hard drive – 3 TB – internal – 3.5 – SATA 6Gb/s – 5400 rpm –

WD Red Pro NAS Hard Drive WD4003FFBX – hard drive – 4 TB – SATA 6Gb/s

WD Black WD4005FZBX 4 TB 3.5 Internal Hard Drive – SATA – 7200rpm – 256 MB Buffer

WD HD3.5 SATA3 4TB WD40EZAZ / 5.4k Blue (Di)

WD Purple WD42PURZ – hard drive – 4 TB – SATA 6Gb/s