If you spray some water, like from a spray bottle, onto your rotors after a drive and the water sizzles, then it's a brake issue. It happened on my 4 runner.
My pads drag on my rotors just a bit. But I can still freely rotate the wheels. My front right squeals sometimes too.
When your driving and you take your hands off the wheel, without hitting the brake, does it pull to one side? How about when you hit the brake? If so, then that side is your problem side. If no pull, then maybe a MC problem.
With the wheel off, you can clearly see the pads to see if the resistance is with them. If you have a caliper or MC issue, changing out to new pads probably wont cure your issue. Maybe, if your pads are SO worn that the pistons are stuck out.
Maybe the bearing preload is too tight. There should be just a hint of play.