I have a 250 GB Western Digital My Book Essential External Disk Drive that connects via USB.
I have had no problems until a few days ago.
When I plug the USB cable into my computer, it says
Your hardware is ready for use
However, when I look in My Computer, the drive is not listed there.
When I click on My Computer, Manage, Disk Management, the drive is not there.
When I click on the Safely Remove Hardware green arrow in the system tray, it displays
USB Mass Storage Device
When I click the properties of WD, it says the device is functioning properly. However, no drive letter is assigned.
Thanks for your help!