Hard drives have been around longer than you think. In 1956, I. B. M. had invented a disk storage unit that was very large but did not store a lot of data. It was twenty-four inches in diameter and could hold only five megabytes, which is the equivalent to three and one half floppy disks. Originally called fixed disks later became known as hard disks opposed to floppy disks. In 1973, I. B. M. released a hard drive that could hold seventeen and one half megabytes. In 1980 Seagate made the first five and one quarter inch hard disk. In the late 1980s, three and one half inch hard disks were invented (PCIN). Although there are smaller hard disks as small as two inches in diameter, three and one half inch hard disks have been made a standard and is used most often today. The capacity in hard drives has excelled thousands of times all over from five megabytes to one hundred sixty gigabytes (160,000 megabytes) which is the equivalent to one hundred eleven thousand one hundred eleven floppy disks. The hard drive or hard disk is one of the most critical components in the operation of a......

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