Seagate 4TB SkyHawk SATA III 3.5" Internal HDD ST4000VX007 B&H
Amazon.com: Western Digital Purple 4TB Surveillance Hard Disk Drive - 5400 RPM Class SATA 6 Gb/s 64MB Cache 3.5 Inch - Western Digital40PURZ [Old Version] : Electronics
Seagate 4TB SkyHawk SATA III 3.5" Internal HDD ST4000VX007 B&H