your sounds like the e brake dragging too. mine made the same sound when i put new rear rotors on, i had to re adjust the e brake shoes.
theres a star wheel you can get to if you dont want to remove the whole rotor and caliper bracket, its inside the hub behind a rubber plug on the back side of the hub, bottom i think, you need a pick type tool to hold the locking bar off the star wheel and back it off till the wheel spins freely. they sell a brake tool that fits perfectly every time, but a large screw driver will work too.