Wander, sorry about that. 1st & 2nd generation computers used a small disc that was fitted in a square 6"x6" cardboard envelope to load programmes or diagnostics into the computer. It flopped about, thus the name. They eventually got the size down to about 2"x2" & the disk was held in a stiff plastic envelope, but it was still "a floppy disk" If my memory serves me right, the maximum storage that it could hold was 1 Megabyte (1Mb).