Originally Posted by HarryT
I've got numerous CD-Rs which are 20 years old. 7 years is most definitely not "tops" for their storage. They don't degrade - keep them safe from physical damage and they should last virtually indefinitely. They were designed for 100+ year storage life.
Unfortunately, some of them do
degrade, depending on the chemicals used in the writable layer. Especially badly if they are subject to UV in visible light.