Alan Shugart, an engineer at IBM, changed data storage forever in 1967. He invented the floppy disk drive (FDD ). The first version used a massive 8-inch disk. Tech enthusiasts later called these smaller iterations “diskettes.” The format shrank again to 5.25 inches. This became the standard for the original IBM Personal Computer launched in August 1981.
Storage capacity was tiny by modern standards. The 5.25-inch disk held just 360 kilobytes. Compare that to the 1.44 megabyte capacity of the 3.5-inch diskette we all remember. Why did it matter? Because it was portable. It let users physically move data between machines before networks were ubiquitous.
Why It Was Called “Floppy”
The name says it all. The 5.25-inch disk was encased in a flexible plastic envelope. You could bend it. This stood in stark contrast to the rigid plastic case that would later define the format.
That flexibility was both its feature and its flaw. It made the media cheap and easy to produce. But it also meant the magnetic surface was exposed.
The Shift to Rigid 3.5-Inch Diskettes
By the mid-1980s, technology improved. Read/write heads got sharper. Magnetic recording media got better. IBM introduced the 3.5-inch diskette. It held 1.44 megabytes. It came with a hard plastic shell.
Computers in the late 80s and early 90s often featured both drives. You might plug in a 5.25-inch disk or a newer 3.5-inch one.
“The 5.25-inch version had fallen out of popularity… partly because the diskette’s recording surface could easily become contaminated by fingerprints through the open access area.”
The 3.5-inch format won. It had a sliding metal shutter. This protected the disk from dust and oils. The 5.25-inch disks didn’t have that shield. Fingerprints on the exposed surface could ruin data.
By the mid-1990s, the 5.25-inch drive was largely obsolete. Manufacturers stopped including them. Users moved to the smaller, more robust 3.5-inch standard. It stayed the dominant portable storage format for over a decade. Then came CDs. Then USB drives. The floppy faded away. But for a time, it was the only way to move a document from one room to another.
