Floppy Drives By anna.jean14 Jan 1, 1972 8-inch Memorex 650 175 KB; Capacity: 1.5 megabit unformatted Jan 1, 1978 5 1/4-inch DD 360 or 800 KB; Capacity: 360 kB Jan 1, 1982 5 1/4-inch HD 1200 KB; Capacity: 1.2 MB Jan 1, 1984 3 1/2-inch DS DD 720 KB; Capacity: 1 MB Jan 1, 1986 3 1/2-inch HD 1440 KB; Capacity; 1.44 MB Jan 1, 1987 3 1/2-inch ED 2800 KB; Capacity: 2.88 MB