to mention that are only 3 hard drive producers now : Western Digital, Seagate and Toshiba.
In the past were many :
Apple Inc. Computer Memories Inc. Conner Peripherals Control Data Corporation Digital Equipment Corporation ExcelStor Technology Fujitsu Hewlett-Packard Hitachi IBM Iomega JT Storage JVC Kalok Kyocera Maxtor Memorex Micropolis MiniScribe Mitsubishi Electric NEC Plus Development PrairieTek Priam Corporation Quantum Rodime Samsung Electronics Sony Storage Technology Corporation Syquest Texas Instruments
But now they are only three, and they can understand well for prices, I suppose.
Some people like the huge capacities of hard drives, but there is a price to pay.