Delete it from device manager and see if the Fund new hardware function restores the connectivity and access to the drive.
I have a Maxtor 3100 external hard drive. I've recently upgraded to a new laptop and the new machine does not recognize hte device as a drive. When you click on the USB port properties or the safely remove hardware function, it does indeed recognize what kind of device the unit is. How can I get the HD to show up as a Drive?

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