 that is manually inserted into a computer. It was first developed in 1971 and was subsequently replaced by other forms of storage devices. Here's an advert from one of the makers of floppy disks back then, 3M. Are you worried about a floppy disk losing all your payroll records? With 3M floppy disks, there are no worries because 3M tests every single one, so everyone is guaranteed 100% error-free for life.