In 2010, it was estimated that storing a yottabyte on terabyte-size disk drives would require one million city block size data-centers, as big as the states of Delaware and Rhode Island combined.[1] If 200 GB microSDXC cards (the most compact data storage medium available to the public as of early 2015) were used instead, the total volume would be approximately 800000 cubic meters, or the volume of 32 percent of the Great Pyramid of Giza.
Using recently demonstrated technology to use DNA for storage, one yottabyte of capacity would require a volume between 0.003 and 1 cubic meter, depending on number of redundant backup copies desired and the storage density: "Our genetic code packs billions of gigabytes into a single gram".[2] DNA is much less mature technology than microSDXC cards (for this application) and accompanied by uncertain costs, but this gives a feeling for potential information density.[3]
