Floppy disk
From MediaWiki
A floppy disk is a human portable data storage device, using a magnetized disc inside of a plastic casing to store data in binary form. They are not in fact floppy, but are generally rigid.
Chip Chase can tear one in half with his bare hands, and this was before he became Prowl.
One 5¼" floppy disk can hold the entire personality and memories of Optimus Prime.
