WD Ext Hard drive model number and specs?

WD External Drives External Drives for PC
2

This drive has usb 3.0 http://support.wdc.com/product/install.asp?groupid=129&lang=en .

This is 2.0 and 3.0 http://support.wdc.com/product/install.asp?groupid=130&lang=en .

This has 2.0 and firewire http://support.wdc.com/product/install.asp?groupid=126&lang=en .