Disc brake squeak?

[Charles M]

Step one is proper alignment / setup.

The brakes should have no rub at all and your rotors may need to be trued (or may be warped beyond reason).

They certainly need to be fixed if it's an actual squeak/squeal.

A brake truing tool is cheap and you can true rotors with practice.

I would pull the whole rotor and lay if flat and see if it's too far gone.

I would then put the rotor and wheel back in and apply the brakes and then (with brakes applied) Loosen the Caliper bolts so that there is obvious caliper release. Keep the brakes applied so that the Caliper sets up in line with the rotor. Then with the brakes still tight, tighten the bolts again. The Caliper should have re-seated itself in line with the rotor

If there's still rub and the rotors laid fairly flat on the table, I would go ahead and hit a shop and have them walk through the fix with you.