Storing Data in DNA

When was the last time your phone complained that you’re running out of storage – annoying right? Often it results you in deciding which photos to delete or which app(s) you will say goodbye to. Now, imagine you are in charge of a massive data centre, e.g. for Amazon or Facebook, and someone tells you that you can replace your massive data centres with a couple shipping containers with the exact same data? Crazy! How is this even possible? How can all this data be stored in a much denser way?