+ 0 Votes Re: External USB Hard Drive Not working Peconet Tietokoneet-217038187993258194678069903632 6 years ago A few things come to mind about your problem: 1. Is the External hdd turned on. 2. Is it self powered? (I:E: Mains)If it is Not then try changing over to another usb port or get a Powered usb hub. 3. Look in "device manager". Start > settings > control panel > system > hardware > device manager. Scroll down to see if you can see anything that relates to your Ex.hdd, it might have a yellow or red tag on it, click on this and select "update drivers" you might be asked for your driver disk relating to your Ex.hdd. Have you loaded your drivers for this hdd?. Hope this helps you.