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You need to raise the vehicle and remove the wheel. Then remove both upper and lower caliper bolts and swing the caliper up and off. Then Remove the rotor.
Remove the snap ring with snap ring pliers.
Pull the shim off with your fingers
Remove the 6 bolts and pull the flange from the rotor
After the flange bolts are removed and the flange then yes the rotor will come off.
You can try to get the snap ring off by using a screwdriver or the tips of needle nose pliers but its a snap ring that it is built to be only used with snap ring pliers. A shim is a washer.
I do not have a picture of the snap ring on your vehicle but here is a pic of the same design on another.