Don't forget there is something called 'CD rot".The CD's we can buy and burn are much softer than the ones burned in specialized factories. What's worse: not all have the same quality. The cheapset ones that can be bought in supermarkets etc are usually not that good. Not only do they write many errors from the first moment, they also become completely unreadable after a few years at the most. Specialized sites that did a lot of research into this recommend you save important data to several CD's of several well-known brands, that you store them in a cool, dry place and hat you burn a new copy every year. Another solution is to burn cd's and, if money allows, buy an external harddisk. As this won't be used all the time but only attached when needed, it will (normally) be a safe place for several years.

I have tried prudent planning long enough. From now I'll be mad. (Rumi)