I have a 2014 Ford focus with 8,000 miles that has a squeaking/ metallic sound coming from right rear. It starts at about 50 mph and gets worse the faster I go.

Do you have a full warranty on this? If so take it to the dealer and let them diagnose/repair at their cost.

Yes, been trying to get someone to go on a test drive with me, but they say they don't have the time to spare but will take care of it. Taken it twice so far but they must not be getting it up to speed because they say it's fixed but it's not.

I bought a 2014 focus 2 years ago that had that same metallic rattle/squeak coming from the right rear...maybe it's the same car lol ....if so, well,130,000 miles later, it still squeaks