Comment Re:Not really new information... (Score 2) 50
I continue to use burned DVDs for backing up the critical stuff. Not perfect, of course, but not electromechanically-failure prone like a hard disk drive, not "terms of service" failure prone like cloud storage, and not "the charge magically held in the gate leaked away" failure prone. I have optical discs over 25 years old which are still perfectly readable.
DVD-R? DVD+R? DVD+RW? Single or dual layer? Gold metallic layer? Silver metallic layer? How are they stored?
Depending on how you answer those questions, your 25 year-old media may be past due and you've just gotten lucky, may be just entering the timeframe where it may die, or may have decades of reliable life left.
DVD-R single layer disks with a gold metallic layer are good for 50-100 years. Other recordable DVD options are less durable, some as little as 5-10 years.