Hello,

First of all make sure that the USB port that you are

using to connect it to your PC is a USB 2.0 port, and

not USB 1.0.

Also if it came with an external power, connect it to

the external power before putting on your PC.

This is because the voltage supplied by USB 1.0 is

lower than that of USB 2.0 and therefore might not

be enough to power up your USB Drive.

After making sure about this, power up your system,

and plug the harddrive, then Right-Click on my

computer icon, select manage, then go to Disk

Management Option.

On the Disk management option Page you should

see ALL the drives installed on your system,

including the hidden ones, so what you will just do is,

try and locate the one representing your harddrive,

and right click on it. then select "Change Drive letter

and Paths", and give the drive any new, unique letter

(i.e alphabet) different from the ones already on your

system, and click on OK.

This should make your harddrive to be detected

automatically.

Try this out and let me know how it goes.

Hope this helps you out.

Goodluck!