DNA could be the future of data storage
researchgate.net
researchgate.net
If it's DNA it seems like you could split and replicate the DNA in a PCR to come up with a huge number of copies. (like they do to amplify DNA for testing)
Not to mention, the future of injecting someone with some data DNA that is to be reproduced by the host body and later recovered possibly without notice by the target. Also using the DNA repair mechanisms to keep the data correct.
Pretty cool stuff.
I recommend http://dnafountain.teamerlich.org/ over the linked interview. It has links to their paper and github page.