 How much digital data has been created so far in the world? In 2020, the amount of data created reached a new high of 64.2 zettabytes. But what is a zettabyte? It's a one followed by 21 zeros. The internet has grown so much that it can no longer be counted in gigabytes. Nor in terabytes. Not even in petabytes. Even exabytes fall short of measuring the size of the internet. And now you know.