Postby pseudorandom » June 4th, 2012, 7:59 pm
If I understand the problem properly, I think see something like this happen already multiple times. The drive appears to be recognized, shows up in Device Manager, but not showing up in Windows Explorer or My Computer. This is when the computer does not automatically assign a drive letter to the drive.
To fix this go to Start -> Administrative Tools -> Computer Management. Then on the left pane, go to disk management. On the right pane, you should see all your disks and partitions listed, including your USB disk. Right click the partition of your USB disk and "Change Drive Letter and Paths" then click Add, then assign a drive letter and OK to all prompts. The drive should show up now. If it does not, depending on what error you get, that will help track down what the real problem is.