MacbookPro won't mount usb drive!

Hi.

have seen alot of familiar questions out there but no good answers that helped me.

I have a one year old Macbook Pro retina running 10.9.2 that i just got. The problem is that it can't mount any of my USB drives. I have tried with USB 3 and 2 drives, 500 GB , 1, 2 and 4 TB disks with its own power supply. All formated with Mac, but that was done with my older macbook pro, that can read and write to all disk without any problem.

I see the main drive in the disk unility but i cant mount them, that part is just gray ( the title of my partition).

have tried with repair disk and so on, but no luck.

Then i moved everyting on mu 500 gb usb disk to another and formated that one on the new retina MBP and then it worked, on all computers.

But I can't move my 1, 2 and 4 TB of data somewhere so i can formate them again.

😐