The CMD FD-2000 and FD-4000 are 3.5 inch floppy disk drives which have been designed utilizing the latest in micro-floppy technology. While retaining backward compatibility with Commodore 1581 formatted diskettes(800K), these drives are also capable of utilizing high density (HD) disks fora storage capacity of up to 1.6 Megabytes. The FD-4000 model can also use the newer enhanced density (ED) diskettes for a storage capacity of up to 3.2 Megabytes.