Floppy disks? You mean those flexible plastic computer disks used for storing data magnetically. Well, I can't believe the guys in The Pentagon are nostalgic about floppy disks.
It was a collaborative project with Commodore Amiga that was stored on Amiga floppy disks for nearly 20 years before they were found and recovered by the Andy Warhol Museum.
I should also briefly mention a close cousin of hard disks, the floppy disk, which is basically the same thing, but uses a magnetic medium that's, floppy.