After last week's Qnap ransomware disaster I picked up my effort again to write all our valuable videos and pictures on m-disc immutable DVD-R and BD-R discs. I really hope that verbatim.com will keep making this excellent archive solution and won't phase them out completely. Imho discs like m-disc are real archival solutions, especially since these are ransomware proof.
@johanbove DVD-R, I mean any kind of DVD does not really serve as a good backup over the years. You have to watch for quality. I have tried it, few years passed, they were stored in quite a good safe place without humidity or sunshine, and they fail after years, like 8 years.
@louis it's not DVD or BD, it's the m-disc format that is much more trustworthy because the data is burned in a rock like material. See https://
Unfortunately it seems the format is not commercially viable enough as many have moved to other media. M-DISC - Wikipedia
Just keep in mind that optical disks have a lifespan and are sensitive to light. Keep them in a dark place and remember to create new copies every ten years.
Regardless of ransomware, having immutable archives is essential for safety.
Do consider the value of online backups, though. Syncthing is an excellent open source solution for this, requiring no dedicated hosted server; it's completely open, peer-to-peer sync with mobile apps, too.