http://www.techradar.com/news/seagate-wants-to-launch-a-20tb-hard-drive-by-2019

In the jostling battle for the biggest hard drive between Seagate and Western Digital – the latter of which holds the title at the moment with its 14TB helium-filled offering – Seagate is claiming to have struck a fresh blow with the development of drive tech which will allow HDDs in excess of 20TB to come to market in 2019.

As Tom’s Hardware reports, Seagate’s new technology is HAMR or Heat Assisted Magnetic Recording, which utilizes tiny lasers to boost storage density.