It used to work.
I could connect my phone to my PC with a USB cable and then browse the phone, like a mounted USB drive, with Windows explorer. Moving files back and forth was easy.
Then it stopped working. I used a wooden toothpick to dig some lint and dirt out of the phone's USB port. I also hit it with compressed air.
It helped but it is really intermittent...I have to wiggle and jiggle the USB cable to get the drive to mount. And it's not reliable. I tried another cable with the same result.
So...what is the best way to clean a phone's USB port?