Hi, it's me again. Since earlier post I've learned that my Mac OS is OS X, version 10.3. Someone also said that only version 9 has the "classic" option which is needed to install the external floppy disk drive. I have no idea how to download version 9 without losing version 10.3. Is there a way to just install the "classic" option without installing the complete version 9? Thanks.
You cannot legally download OS 9. It's very possible that the installer DVD that came with your iMac has a 'software restore' feature, one part of which will be for installing Classic. You really want to avoid using anything that requires Classic/OS 9. It's now 5 years+ old and will never be updated and it's support life is getting very short.
Personally, I don't believe that you need to use Classic for the floppy to work. And if so, you should replace that floppy drive with one that works in OS X. And then get your data off floppies, throw that floppy drive in a closet on a shelf and never look at it again.
Have you just tried plugging in the floppy drive and putting a floppy in it?