I will demonstrate how to disassemble a My Book using a new 500gb My Book.
Step 1: Removing the cover
To remove the cover of the My Book, you will need a flathead screwdriver. I also used razor blades, but they can be replaced or omitted if you would like to do it differently.
First, use a flathead screwdriver to pry the mesh away from the cover (do not try to lift the cover up, you will just break things). Start to pry in the middle of the book and you should see two plastic snaps lift up, I put a razor blade between the snaps to prevent them from locking in again. Do this to both sides.
Second, begin to pry the binding area of the book away from the mesh. Pry in small amounts, alternating from one end to the other. When there is enough of the gap, you will be able to slide the cover off of the mesh with your hands.