Acer 5750g usb drive not working

[Guest]

the other two work. its a bit annoying. id appreciate any advice you could give me.
thank you

 

[WR2]

Which USB port is it? USB 3.0?
Does a visual inspection of the port with a good light give you any clues?
And you've tried a wide range of gear in the port? Not just high powered devices?

General guidance on USB port repair:
How to Repair a Laptop USB Port