I work in a niche inside a niche. I deal with terabytes of storage, massive servers, a variety of storage tech, and I’ve been in interested in computers in general for… Around 40 years. (Yeah, I’m old.)
I have my own single person company and have worked in 40+ US states, done assignments in the UK, Norway.
AMA.
Every media is subject to failure. It’s the process that protects.
If you’re keeping something for your family, consider putting it online on a sharable cloud storage system, or using software that distributes the data to everyone’s computer (BitTorrent / Resilio Sync / DropBox, etc.)
If you want something physical, I’d get a ‘tough’ or ‘high endurance’ USB stick or SD card, and keep updating it quarterly. Flash doesn’t have a great reputation for longevity/durability, so I’d wipe the USB stick clean with zeros then re-write everything with each update.
Thanks!!!