My current thinking. CD's are the equivalent of CD's. Like you said, thirty years later they still work. DVD's are probably close. Spinning disks are probabl

My current thinking. CD's are the equivalent of CD's. Like you said, thirty years later they still work. DVD's are probably close. Spinning disks are probably ok if used as write once. All of these have lots of compatible hardware and software. Tape is great at scale. But you're not at scale. The cloud is one declined credit card away from erasure. Good luck.