Squealing Noise

When I go in reverse I hear a Squealing noise, it always happens while going in reverse but only happens sometimes while going forward. Its not a screeching noise like, just squealing but its loud, and from what i can tell its only come from the back driver sided wheel, i checked the brakes still good so idk what im dealing with
please if any of you have had this before tell me what you did
 
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