Seagate Technology created the first hard disk drive for microcomputers, the ST506. The disk held 5 megabytes of data, five times as much as a standard floppy disk, and fit in the space of a floppy disk drive. The hard disk drive itself is a rigid metallic platter coated on both sides with a thin layer of magnetic material that stores digital data.
Seagate Technology grew out of a 1979 conversation between Alan Shugart and Finis Conner, who had worked together at Memorex. The two men decided to found the company after developing the idea of scaling down a hard disk drive to the same size as the then-standard 5 1/4-inch floppies. Upon releasing its first product, Seagate quickly drew such big-name customers as Apple Computer and IBM. Within a few years, it had sold 4 million units.