https://www.newegg.com/gold-wd181kryz-18tb/p/N82E16822234420?Item=N82E16822234420&utm_medium=Email&utm_source=Automation052722&cm_mmc=EMC-Automation052722-_-EMC052722-Index-_-Desktop+Internal+Hard+Drives-_-N82E16822234420&ignorebbr=1
WD Gold 18TB Enterprise Class Hard Disk Drive - 7200 RPM Class SATA 6Gb/s 512MB Cache 3.5 Inch - WD181KRYZ - OEM
$359
5yr warranty. Worthy of buying an enclosure. WD's best.