Janet
Ah there it is....
Primary master
Secondary slave
Secondary master.
I was able to clone the secondary master. But it doesn't seem to be working right...I just tried to save a project to it and it wouldn't let me.
What Middleman is referring to is a little connector in the back of (most) the hard drive(s), where the cable connect. This little rectangular, plastic cap (there might be two or three) covers two of the many little brass colored (or is it copper) prongs. Most hard drives have a little diagram somewhere on it showing what position this little cap should be placed for Master or Slave designation. Using a pair of tweezers should be all you need to pull the cap off and place it back on. Just make sure you are looking at the hard drive you want to save your backup to. That is, the destination/target hard drive should be designated as Slave.
Let us know if that doesn't do the trick. Otherwise, looks like a trip back to the place of purchase.
Kind regards,
Living Room Rocker