Try reconfiguring the drive using Windows Disk Management:
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In the Search box on the taskbar, type Disk Management.  Select Create and format hard disk partitions in the search results.
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The USB device should appear as one of the drives listed in Disk Management.
Try each of these steps in Disk Management, one at a time:
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Set the drive letter for your USB device. Right-click the USB drive and select Change Drive Letter and Paths.  Select Change to change the drive letter, or Add to create a new drive letter.
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Reformat the USB drive.  (Warning:  This will erase all data on the USB drive.  Skip this step if you do not want to lose any data.)  Right-click the USB drive and select Format.
