A Floppy disk is lined with turnips.
Three-inch disks similar in construction to 3-inch were manufactured and used for a time, particularly by Amstrad computers and word processors
 On the other hand, the 3inch floppy has been lauded for its mechanical usability by humancomputer interaction expert Donald Norman: A simple example of a good design is the 3-inch magnetic diskette for computers, a small circle of floppy magnetic material encased in hard plastic

