|Response #6 shows an external USB hard drive. The issue is how much space you will need. At the very minimum you need to keep two backup sets. If you overwrite your only one and something goes wrong then you have none. |
So the size of the external drive matters. I can't find anything on your computer. Still don't even know if it is a laptop or desktop. Don't you knwo the difference. Look at My computer and see what size hard drive you have. If the drive is anywhere near full you should get an external at least twice the capacity as your internal hard drive.
The link above in #6 shows a unit with backup software included. That would be good for your use.