Storing 3D scans in a grain of wheat (wafaabilal.com)

But how do they prevent data corruption?

Would be a fun premise for a book... someone finally figures out the error correction encoding scheme, and a vast amount of "junk" or otherwise misunderstood DNA in our biosphere is actually chapters of a historical archive left to us by an advanced biotech civilization from our ancient past.

Depending on what we learn from the archive, it could go more towards sci-fi, fantasy, or horror...