Don't depend on CDs or thumb drives to keep your photos, unless you have three copies of each stored in cool dry places at different locations. CDs were supposed to last a very long time, but they don't. Thumb drives, hard drives, and floppy disks have even shorter life.
I've been doing digital photography since 1997 and have gained considerable experience with this. Even early digital prints don't last as well as the old paper photos and film. There are now special Archive type DVD drives and disks, but they haven't been around long enough to prove just how good they really are yet. Old photos like you posted can be restored and reprinted. I have restored and printed photos from 120 year old glass plate negatives, and these were some of the best quality old photos that I've ever seen. Modern photo technology is good, but the old masters had something that could last longer, if stored well. We aren't really anywhere near there yet with digital photo technology. Keep extra copies in several formats and media, is my best suggestion. For photo file formats, Jpeg is the worst. Tiff when saved at high resolution, is considerably better.
Central North Carolina