Mount failed for usb3.0 pen drive on MBP Retina

Question

I have 32GB pen drive, trying to connect it to MBP Retina.
OS version is the newest one.
Pendrive works great with Windows 7 and WD HD Live.
Tried to format pendrive with all available file systems (from Fat32, exFat, MacOS Extended) - and format works OK.
DiskUtility see the pendrive without any issues, but can not mount.
Following error appears:
- the disk could not be mounted. Try running First Aid on the disk and the retry mounting.
Verify Disk and Repair Disk completes without issues, but pendrive is still can not be mount.

Answer 1

I was having this problem with the exact same USB drive (Lexar USB 3.0 32GB) and an early 2011 Macbook pro. I tried EVERYTHING to make it work: most of the things you did including resetting the PRAM and the SMC and tried every kind of formatting (Mac Journaled, exFat, Fat32....), I tried every port on my laptop, I cleaned the contacts.... nothing worked. It was working on a friend's newer Macbook, and on my roommate's brand new windows desktop. However, on my computer It wasn't showing up in Finder or in Disk Utility no matter what I did.
I then read this comment on another forum: "Likely the problem is the USB 3.0 plug going into a USB 2.0 socket. Move it back and forth a bit and it should connect. For me this works every time."
And it works. I just have to move the USB drive slightly away from my screen and presto. I am not sure how great this is for the USB port itself but I have decided to sacrifice one USB port to using my thumb drive because I need it every day.
I too spent hours trying to resolve this and this was the solution, and it's been working for months.