I hope this is something simple I'm doing wrong, but I'm stuck and need some help please! I have purchased a Seagate 500gb 2.5 inch laptop hard drive to replace my feeble 120gb drive. I am trying to set up this drive using carbon copy cloner before changing it over, I'm using an external enclosure for this. The problem I'm having is the hard drive isn't recognized at all. It's not showing up in finder or disk utility so I don't know how to format the drive. Can anyone help me? Am I missing something very, very obvious here? I'm using Leopard 10.5.6 The instructions that cam with the enclosure mention setting the hard drive to function in master mode, what does this mean? I don't want to go to all the effort of changing the hard drive if there's some sort of problem, and I would rather clone my drive before removing it too. Any help gratefully appreciated!