I think that WD falls short on one all-important requirement we all must face - marketing the voltage input for the devices they sell. I’m currently looking at purchasing the My Book Pro, and nowhere is it listed. What happens if I take a 120v adapter and plug it into a 240v outlet? Trouble. Knowing this item is essential before purchasing. If somebody could enlighten me on this, I would be most grateful.
I found a list on the support site about the power adapter that use the drive. See the following link.
However, it does not say if is a 120v or 240v.
I’ll recommend you to contact the WD online store to see if they have that information available. Also, you can try creating a case with WD support to see if they can help with the information.