Originally Posted by
PAXboy
high quality PDF scan files on CD. So we have them for reference and family archive.
You might need to check out the likely lifetime of the CDs. I recently found a CD I made just over 20 years ago and I had trouble reading it and didn't get all of it. The exact technology will matter CDR, CDRW, ... ...
Sorry but I can't help with long term storage advice. More than one copy sounds good and at least one of them on a cloud somewhere also sounds attractive depending on how much you have to store and the costs. I am sure there will be many articles about it.
Google - long term digital storage solutions
I skimmed these and they seem not-ridiculous
https://askleo.com/best-long-term-storage-media/
https://www.howtogeek.com/356473/how...ually-forever/