List of WD CMR and SMR hard drives (HDD) – NAS Compares
WD40EFZX - Western Digital Red Plus Wd40efzx 4 Tb Hard Drive - 3.5" Internal - Sata (sata/600) - Conventional Magnetic Recording (cmr) Method - Storage System Device Supported - 5400rpm - 180 Tb Tbw - 3 Year Warranty | DirectDial.com
Western Digital (WD40EFZX) Red Plus 4TB 3.5" 5400RPM NAS Hard Drive
WD Red Plus WD40EFZX or WD Blue WD40EZRZ. Intellipark, CMR/SMR | Overclock.net