WD Ultrastar DC HC550 18 TB 3.5" Internal HDD 0F38459
WD DC HC550 Ultrastar 18TB 7.2K 4Kn SATA 6Gb/s HDD WUH721818ALN604 NEW | eBay
Amazon.com: WD Ultrastar DC HC550 18TB 7200RPM 3.5" SATA Hard Drive WUH721818ALE6L4 : Electronics
R20GG - New - DELL EMC / WESTERN DIGITAL 18TB 7.2K RPM SAS III 3.5 INCH LARGE FORM FACTOR LFF ENTERPRISE CLASS ULTRASTAR DC HC550 SERIES ADVANCED FORMAT AF 512E 12GB/S SAS3