Loony data storage

I was thinking about all this music that was either never recorded, or which recordings did not survive.

Then, I was thinking about the TV and radio programs that were broadcasted into space. They are still there traveling at the speed of light. Occasionally, they bounce back and we can pick them up.
Then, I thought: Wow!

If we use the broadcasting into space and bounce it against the celestial bodies, let's say a few years away, we could create an unlimited, long-term storage device. 

This storage would be good for serial data for which we don't have the capacity today, or we don't have used, but which might come useful in a few years.

What might it be? High-resolution images were taken every second from satellites, medical, or other fields. Today, these might be useless, but in a few years they might be used in climate comparisons, or
population health studies.

Loony? Maybe, but fun to think of...

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