In 1983, Apple finally announced a single and dual external drive (UniFile and DuoFile) implementing the 871K "FileWare" mechanism used in the original Apple Lisa, as a replacement for the Disk II & /// drives.
The Disk IIc (A2M4050) was a half-height 5.25-inch floppy disk drive introduced by Apple Computer in 1984 styled for use alongside the Apple IIc personal computer, the only Apple II to contain a built-in disk drive mechanism.