LONDON:-The data-storing abilities of hard drives could soon swell to 40 terabytes (TB) and beyond, says Western Digital. Currently the largest hard disk drive (HDD) that stores data on spinning disks can hold about 14TB of information. Western Digital said the bigger drives were made possible by finding a way to use microwaves to write data on 3.5in drives. The first bigger-capacity drives should go on sale in 2019. While solid state drives are popular with home users, many large companies and web firms fill data centres with disks that depend on moving parts because, at high capacities, they are much cheaper and last longer.

The drives store data on disks or platters that spin at high speed.