What I did was make an empty disk image on my external HD using Disk Utility. Then I mounted that empty disk image. I backed up my drive to the disk image. Works just fine.
SD or CCC will erase your external drive before cloning. If you can fit everything from the external onto the internal, then you can safely wipe out the external and clone.
What I did was make an empty disk image on my external HD using Disk Utility. Then I mounted that empty disk image. I backed up my drive to the disk image. Works just fine.