Has this not all been said before?? Nothing is 100% safe. I get paranoid with a lot of my data so I backup as often as possible and test. CD's lasting 75 years etc.. how they know that? they test in unrealistic conditions and most of it is worked out as an average. All I can say is do not rely entirely upon your cd backups. Hey we all do our best to try and be safe but anything could happen. If I could, when booking a flight I would request a seat in the black box recorder since that is the only thing that seems to survive a crash.