Most likely answer is handbrake brake shoes come loose and rubbing against drum
WARNING: if this happened suddenly with no reason (meaning: you had no work done on the handbrake) then get in investigated IMMEDIATELY
The handbrake brake shoes have likely delaminated and come away from their backings, meaning that they could shift and jam the wheel, resulting in broken axle, bent and damaged rear suspension, accident and at worst death.
I've spoken to Volvo techs who have seen this happen.
OK, no death that time, but lots of damage.
Other possible reasons in decreasing order of likeliness:
Worn or bent suspension components causing very bad rear wheel alignment. Did you hit anything recently?
Tyre wear or delamination causing bad wheel alignment
Worn wheel bearing - but normally they make a lot of noise
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XC90 R-Design MY2009, Black Sapphire Metallic. HP-Sound, RSE, Nav, Tel, ParkingCam, BLIS, ParkingHeater, RestHeat, Removable Towbar, Summer: CRATUS 20x8 on Pirelli Scorpion Zeros 255/45, Winter: NEPTUNE 17x7 on Continental WinterContact 4x4 235/65.
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