I thought I need pads and rotors because I heard the squeaking when I traveling in
a parking garage. Well had to repair a rear tire and when the tire was pulled off I looked
and I had a ton of pad left???
What I did notice was that it was hard to turn the rotor and then I hear the rubbing noise, which I assume is magnified when driving at slow speeds.

I did see a little edge on the outside of the rotor but not a real ridge.

Could the piston not be going back in or caliper not sliding back? Are they like other brakes where the caliper slides?
When I put on the new rotors and pads is there lubing that needs to be done?

 

Did you look at both the inner and outer pads?
Are the slides free?

If the above is OK I would not worry.
Some of the harder pads squeek.