Thank you for your reply. The Western digital hard drive is model:WDBBGB0040HBK-NESN and is 4GB. The My Book drive is formatted as a single exFAT partition for compatibility with all updated Windows...

Model : Hardware Version : Firmware Version : ISP : I'm trying to add a new Western Digital My Book backup hard drive but all it comes up with is ' Drive1: WD (My Book 25EE) 4004 ' and does not...