We have data from thousands of years ago that has survived on stone tablets, papyrus, etc., but we don’t know what the failure rate is. The surviving items migh

We have data from thousands of years ago that has survived on stone tablets, papyrus, etc., but we don’t know what the failure rate is. The surviving items might be 1% of the originals. The best way to preserve data long term is to make lots of copies, distribute them widely, and migrate the copies onto new technologies periodically.