Fragile life of digital data

I found that the short animation that I made a long time ago was unable to play, so I converted the data format into a new one to see it again.

Pictures drawn on rocks can be seen after tens of thousands of years, paper or clothes may last for a thousand years, and phonograph records and pre-recorded tapes are good for several decades. The newer a media is, the shorter the life of it becomes.

Digital data can be seen only a few years. In terms of leaving a legacy for the future, the vast amount of the data that being accumulated every day might not be useful.
T.S