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More than 200 companies have produced HDDs historically, though after extensive industry consolidation most current units are manufactured by Seagate, Toshiba, and Western Digital.HDD unit shipments and sales revenues are declining, though production (exabytes per year) is growing.Later "Winchester" drives abandoned the removable media concept and returned to non-removable platters.Like the first removable pack drive, the first "Winchester" drives used platters 14 inches (360 mm) in diameter.The latter were primarily intended for the then-fledgling personal computer (PC) market.As the 1980s began, HDDs were a rare and very expensive additional feature in PCs, but by the late 1980s their cost had been reduced to the point where they were standard on all but the cheapest computers.

Some high-performance HDDs were manufactured with one head per track (e.g.The IBM PC/XT in 1983 included an internal 10 MB HDD, and soon thereafter internal HDDs proliferated on personal computers.External HDDs remained popular for much longer on the Apple Macintosh.Most HDDs in the early 1980s were sold to PC end users as an external, add-on subsystem.The subsystem was not sold under the drive manufacturer's name but under the subsystem manufacturer's name such as Corvus Systems and Tallgrass Technologies, or under the PC system manufacturer's name such as the Apple Pro File.

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