Of course, there have been demonstrations using biological substances, protein strains & whatnot, as memory devices.
Biological Freaks. Muscle Freaks.
And mustn't forget the humble cartridge.
Cartridge freaks. (Although that sounds like a printers nightmare)
And of course flash memory!
Flash Freaks! Silicon Freaks, Solid State Freaks, Sand Freaks.
And those little glass cubes ....
Cube Freaks. Glass Freaks.