speaking of backup
make sure you use discs that are archival quality - such as verbatim
(theres another brand as well - which escapes me, Tayoung ?) apparently theyve been reducing the coating on cds and over time it evaporates.

The US Army is suing some cd manufacturer - they backed up the last 30years of medical records - shredded the paper copies and found out a couple of years later the cds were no good. (the coating evaporated and they were unreadable)
There is in fact no guarantee on cds or dvds (other than ones that are actually printed - like movies etc.) Some may last only 16months.

iT may be best to make extra backups and store them (in cases upright)
in dark temp controlled places. Or do a net search on archiving cds etc.

Im also putting all my family photos and movies on cd & dvd, and I was surprised to find out about the short life of these things.
(Theres also the inevitable format change too)
Petr