Hi,
I am having the same problem as so many others my friend. It appears the product is defective - the problem I have found is solved if you pick up the harddrive (wait for it) and hold is vertical or move the USB cable a little so the drive is recognised. Whichever way you look at it, from a business point of view this product is not up to WD normal standards. I suggest a product recall and replacement once you have re-engineered the USB connection issue.
Cheers
