It’s not just HDDs that are getting larger, SSDs and magnetic tape is as well. Samsung announced up to 128 TB SSDs available by 2018 with its latest generation of V-NAND flash memory and LTO capacities of over 10 TB per cartridge native should be available soon. Just how large can single storage devices be and continue to be useful?
https://www.forbes.com/sites/tomcoughlin/2017/10/07/how-big-can-storage-devices-get/#403e97b31605