One extra thing on my append above.
If you have a lot of music and photos (and other things) to back up it is NOT a good idea to stick everything together on the same CD or DVD.
It is better to split the files you backup into subjects as it is easier to find them afterwards.
So put all your photos on the one CD or DVD. When that is full have a second CD or DVD just for photos. Put a label on them PHOTO1, PHOTO2, PHOTO3 etc so they are easy to find.
Same with music. Put all your music files on one CD or DVD, and gradualy get more and more so have a MUSIC1, MUSIC2, MUSIC3 etc
Also "other" persona files such as Word documents and so on, put them on a separate set of CDs or DVDs.
It may sound a lot of work, but believe me it is MUCH easier to find something later if you organize your backups.
When a family member says "where's the pictures from last Christmas" you can put your hand to them easily.