It's not a dumb question, because an answer requires a basic understanding of how drives are setup on the Apple II. (I'm going to ignore the Apple III, because I know nothing about that machine.)
The Apple II, II+, and IIe can support two drives per controller. Both of those drives must be 5.25" drives. (I don't know if this limitation exists for third party controllers.) You can, of course, install more than one controller to support more than two drives.
The Apple IIc models that support only 5.25" drives can only have one external drive (the second drive in the "chain" is the internal drive). Of course, you cannot install more floppy controllers, so you are limited to two drives.
Later Apple IIc models, ones that support 3.5" drives, I have no experience with.
The Apple IIgs's internal controller appears to support 4 drives in a chain, but it actually looks like two different controllers in software. The 3.5" drives are in the virtual slot 5, and the 5.25" drives are in the virtual slot 6. Of course you can add more controllers to add more drives, but it gets tricky because many of the slots appear to be used for other hardware (e.g. serial ports). Of course, those other slots can be disabled.
The Apple IIc+ is superficially like the Apple IIgs, but you cannot add more controllers so you are limited to 4 drives.
