if you put a 2.5 inch drive you just want
this cable. if you want to put a 3.5 inch drive you want
this cable or
that. with the later you can add and an external cdrom too. and of course cables to power up the drives. the safest way is to power the drives direct from the external psu, but if you have only the original a1200 one, better find some other for external use.
