I decided, since I didn't wanna throw money into my dead iMac G3 that hasn't worked in two years, I was gonna pull the Internal hard disk out of it and put it into a External case so I could plug it up to my new computer and get some old files I wanted off it. Only problem is I don't know what size the hard disk is. Online, they have so many different sizes of external cases and I got flustered with it. Thought I'd ask around and get some advice. All I need to know is how do I know what size the hard disk is? It's the original hard disk that came with the iMac G3. It's a Quantum Fireball EX, 3.5 Series. And since I'm here, anyone know of some good and cheap external hard disk enclosures that would work with it? 