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can't see external usb drive in Computer

Posted on 2014-08-31
Medium Priority
Last Modified: 2014-09-17
Hi, I have an external USB hard disk plugs to a server which runs 2008R2.

I can see the drive in the Disk Management, but can't see it in Computer. I was able to see it after plugging in for a while. However, it disappeared later on, but still listed in Disk Management.  Any idea? Thanks
Question by:tonitoni99

Expert Comment

ID: 40296101
Check whether the drive letter is assigned to the external USB hard.

If not assigned a letter to the USB drive and check the my computer for listing..
LVL 93

Expert Comment

ID: 40296169
and be sure the disk has its own power supply; if not, that can cause the disappearing
if it has no power - use a POWERED usb hub, like this :  (top 10 listed) :
LVL 24

Accepted Solution

Eirman earned 2000 total points
ID: 40296396
Consider removing the hd from the caddy and inserting it directly into your PC in a spare sata location.
If it works, then your hd caddy is at fault.

Try this great little free utility

I use it on XP & Win7 (have not tested it on Win8) with this type of device ...
I have a stack of bare drives that I can insert and remove very quickly .... great for archiving!
A useful trick with defective USB devices is to reboot, go into "Device Manager" and remove any defective USB listings (yellow triangle) and plug in your USB device again.

Expert Comment

ID: 40296455
Checkout the link below.I hope you will get the solution:


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