Bill Garber wrote:
The card for use with the UniDisk 3.5" drive is called "Apple 3.5 Floppy Disk Drive Interface Card". Mine says Apple II UniDisk 3.5 on the box.
That's a good choice and usually the easiest 3.5" controller to find. Still if you're looking for a 3.5" controller I'd keep an eye out for the Superdrive card. It'll run 3.5" Unidisks if need be but it'll also work with the 1.4mb drives. Wayne