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A magnetic disk for storing information electronically. The original floppy disk was floppy because it was thin and 5.25 inches square. Today's floppy disks measure 3.5 inches square and are more rigid in construction. They can be removed from a disk drive. Disk drives for floppy disks are called floppy drives. Floppy disks are slower to access than hard disks and have less storage capacity, but they are much less expensive. Typically they are limited to 1.44 megabytes of storage space.