Hello and welcome to Just answer.com, Super mechanic here. About your vehicle.
Here are the steps for the rear rotors.
REAR DISC BRAKE
COMPONENTS REMOVAL (DISC BRAKE PAD)
Tap the rotor off with a hammer.
To install, reverse the removal procedure
Yes, you might want to try a little WD-40 around the center of the rotor and then you will want to hit around the hub with a hammer to jarr it loose.
When it starts to move then you want to just tap from the inside around the rotor to get it off.