quality:correction, structural:expansion
Manufacturers and sales

More than 200 companies have manufactured HDDs over time, but consolidations have concentrated production to just three manufacturers today: Western Digital, Seagate, and Toshiba. Production is mainly in the Pacific rim.

HDD unit shipments peaked at 651 million units in 2010 and have been declining since then to 166 million units in 2022. Seagate at 43% of units had the largest market share.