According to the statistics portal statista.com , the amount of digital data created worldwide in 2015 was about 8.5 billion terabytes. By 2020, the volume of data created annually will have increased almost five-fold to the gigantic figure of 40 billion terabytes (equivalent to 40,000 exabytes or 40 zettabytes). A large portion of this digital information arises from online video services and from images of ever higher resolution.