Well ... it seems you might be right. Another estimation states: "Capable of storing 215 petabytes (215 million gigabytes) in a single gram of DNA, the system

Well ... it seems you might be right. Another estimation states: "Capable of storing 215 petabytes (215 million gigabytes) in a single gram of DNA, the system could, in principle, store every bit of datum ever recorded by humans in a container about the size and weight of a couple of pickup trucks." http://www.sciencemag.org/news/2017/03/dna-could-store-all-worlds-data-one-room http://www.sciencemag.org/news/2017/03/dna-could-store-all-w... Not sure what they base it on though. Perhaps we'll have to do a more proper calculation ourselves ...