Hello, I have a WD 500 GB external harddisk(an internal harddisk connected thro USB as external hard disk),. the problem is,. the device was working properly. Now, all of a sudden, when I plug it in, the device is recognised(I can only see in taskbar that a USB has been connected and can be safely removed), but, I cannot see it in Explorer, Disk manangement. I tried with 'n' number of friends laptops, but, still the same problem. My guess is that it might have a problem in reading, do I have any luck with HD guys ?