Fairlight-CMI

Hi everybody

Will someone be able to tell me which hard drives the CMI III can 
use and how large the drives size limit is? I'll prefer any 3½ inch 
hard drive if possible. 

I'm on OS 6.03. 

why I ask this is because I want to connect an external hard drive 
to the CMI for backing up existing drives.

Thanks and my best to all of you in this community

Brian