You may notice that a floppy "disk" doesn't actually look like a disk, it's a rectangular object made out of plastic, so why is it called a floppy "disk"?
That's because the actual disk is inside of this rectangle. There's a metal part at the top that slides to reveal the disk, and the metal circle at the center can be used to rotate the disk.
In other words, when the floppy disk is place into a floppy disk drive, the drive slides the top part to be able to read the disk, and spins the center part to be able to view different sections of the disk.
For reference, here's a video that shows someone removing the disk from a diskette:
- It's All Geek to Me - Restoring Old Floppy Discs [https://www.youtube.com/watch?v=q5MkWtQwx-s]