INTERNAL HARD DRIVES WD Gold 4tb Enterprise Class Disk 7200 RPM SATA Gb/s 128mb $241.21 - PicClick AU
EMC/Isilon 4TB SATA 7200 RPM 6Gbps Hard Drive 0F19459 w/ Tray X410 X System. Qty | eBay
693720-001, Hewlett Packard Enterprise 4TB hot-plug SATA hard disk drive - 7,200 RPM, 6Gb per second transfer rate, 3.5-inch large form factor (LFF), midline (MDL), SmartDrive carrier (SC) | EET