https://www.theregister.co.uk/2018/10/25/western_digital_hc620/

Western Digital has claimed its shingled 15TB Ultrastar DC HC620 is the highest capacity disk drive in the world.

It is a follow-on from the 14TB Hs14 drive, available in either 14 or 15TB capacities. Both the Hs14 and the HC620 are helium-filled drives with, we understand, eight platters.