WHAT are you trying to back up?
If you have a very simple configuration on the PC. A system that has had very little modification and few applications installed you might just want to save your data. Save the photos, spreadsheets, document files, etc. If you loose the system you just rebuild it or buy a new one and copy over you data.
Frankly I am not very happy with the quality of software these days. Reading reviews of backup software and finding a good package has not given me warm fuzzy feelings.
I run a backup program,
Migo Software, Inc. - PC Backup Pro : Backup PC, save data, backup my PC, protect PC files, data recovery, automated backups, that runs a couple of times a week. Since I have not tried a restore I don't know if it really will work. So I hope that I never loose the hard drive and two if I do, the software will restore.
To backup the backup I copy all of my important data by hand to USB hard drives, USB thumb drives, and DVDs. The only data that I have that really consumes disk space are photographs. Spreadsheets, documents, etc take up very little space. I hundreds of GBs of photos that uses up the most disk space.
DVD backup is problematic if you have lots of data. Cheap DVDs likely have a limited lifetime. I have used cheap DVDs but I have also started to use Verbatim has a couple of different DVD that SHOULD provide a much longer lifetime than the cheaper media.
The system I can rebuild if I have too. Hopefully I will not have too and if I do the backup will recover. If not I have my manually copied files.
Later,
Dan