Grinding noise but not pads
Some common possibilities are a faulty outer CV joint on the axle (https://www.yourmechanic.com/services/axle-cv-shaft-assembly-replacement), a defective wheel bearing (https://www.yourmechanic.com/services/wheel-bearings-replacement), and/or interference between any rotating component (rotor, hub, etc) and fixed components such as the brake splash shield. There are other possibilities...