Hi, I posted about using right click on the drive and then 'Explore'. I had the same trouble and that opened the drive. But now I found a solution that worked for me rather than a 'work-around'.

In Control Panel, open 'Administrative Tools', 'Computer Management', 'Disk Management', then in the lower right-hand scroll down box, scroll to the F drive, right click on it and then open 'Change Drive Letter and Paths...then just left click on the drive letter in the upper box and 'OK' and close out of the Admin Tools, go to your USB device and it should now 'OPEN' normally.

Ours was apparently caused by malware removal, and by going to Disk Management, clicking on the drive letter and OK it re-established the path correctly.

I also had a Sony camera that showed up a Drive H with the same trouble and the same steps cleared it as well.