Sounds like a definite brake problem! It doesn't sound suspension related anyhow. I would not visually inspect it, but try rotating the rotors on the spindle, and eye it from the side. Just make sure the 2 flat head screws are holding the rotors tight to the spindle. In some cases you may have one longer bolt holding the caliper bracket to the spindle, also causing it to grind when turning. Also, check for any grinding chips around the areas.