Remove the back case of the Zune 30 GB.
Remove the plastic screw cover located on the bottom of the device. Insert a small flat-headed screwdriver into one side of the cover and gently ease it out. Repeat on the other side.
You will need a #00 Phillips screwdriver to remove the two 2.6 mm screws that are exposed.
Use the blue plastic opening tool to slowly work your way around the edges of the case, releasing the front plate from the bottom case.
Turn the Zune over so the screen faces downward. This will ensure the battery does not fall out and pull on the cable.
Pry up from the bottom of the Zune because the headphone jack will not allow you to remove the back case in one pull. You must slide the case up and away from the rest of the Zune.