I have a WD My Passport ultra with a bunch of files backed up to it. These files were backed up from a Mac laptop. I then plugged in the HD to a windows 10 desk top. I'm not sure if the translation from one OS to another is significant here. When I go into Control Panel, I see that the device is recognized. I was even able to create a shortcut for it on the desk top. I see in disk management that the appropriate drivers etc are installed. But, when I click on it, it only shows a drive property menu. The Drive does not show up in in my files at all. I'm frankly baffled. Some googling suggests that the issue may be that the drive is not assigned a letter, but when I went into Computer Management -> Disk Management, and located the drive but the "Change Drive Letter and Paths" option is greyed out.