well first off to answer your question, HP's Pocket Media Drives are a good backup and file transport solution for the budding multimedia maven. They work with an increasing number of midrange HP PCs and will also work with any USB-equipped PC.
You can use it in the same way, to back up your computer's data or to transfer large files without having to resort to a slow network.
I got this from here:
http://www.pcmag.com/article2/0,1759,2113972,00.aspHopefully you'll find what you need to solve your query there

Also, you say you have no idea what you're doing. Is that with the hard drive or the computer ?? Please inform me so i can give you some help on your matter!
-Schizo