how to add a backup device

Hi all,

I am planing to take a backup for my XI PRD server on an external hard drive which is connected directly to the XI PRD sever via a USB cable.

Now my question where should we define it so that when we want to take a backup thru DB13 it should show my external HDD.... for the backup

Can anyone help me do this please, its urgent for us...

I am not sure where do we define the devices...

We are running SQL server 2005 on WIN 2003 server, ECC 6.0

waiting to hear more from you.

Thanks and regards

Hari