IBM researchers have developed the world’s smallest magnet using a single atom and they packed it with one bit of digital data. Currently, hard drives use about 100,000 atoms to store a single bit of information a 1 or 0 using traditional methods. Breakthrough could allow people to store 1,000 times more information in the same amount of space in the future applications. Future applications of nanostructures built with control over every atom could someday make data centers, computers, and other personal devices radically smaller and more powerful.
Source: https://thehackernews.com/2017/03/atom-data-storage.html