WD Elements Portable WDBU6Y0020BBK - hard drive - 2 TB - USB 3.0
WD Elements Portable WDBU6Y0040BBK - hard drive - 4 TB - USB 3.0
WD Elements Desktop WDBWLG0040HBK - hard drive - 4 TB - USB 3.0
WD Elements Desktop WDBWLG0060HBK - hard drive - 6 TB - USB 3.0