USB harddrive not listed

[imported_mystro]

I'm seeing this USB HDD listed in device manager and it's listed as working but I can't located it using explorer or in my case powerdesk. I can change to another harddrive with no issues....I did have problems booting this hardrive before I switched it out so maybe it's really totally dead? Any ideas for a final test?

 

[Navid]

Right click "My Computer" and click on "Manage".
Select "Disk management".
Does it show the disk?
You may need to assign an unused drive letter to it (which you can right there) to make it show up under explorer.