Hmmm. 12 atoms to a bit.
"On the other hand, the experiment was carried out at 1 degree Kelvin (minus 272 Celsius) and the storage became unstable at 5 degrees Kelvin. The researchers believe it would take around 100 to 150 atoms for the technique to work at room temperature.
That’s still up to 10,000 times fewer atoms than existing technology. IBM’s Andreas Heinrich has noted that an incredibly conservative estimate of being able to use 100 times fewer atoms in practice would make a 100TB hard drive viable."
Interesting. Would love a 100TB hard drive.