It worked perfectly with my MacBook Pro for a few weeks, and all of a sudden, MacBookPro stopped recognizing it.
I would plug the drive in, it would power up the LED, and I can hear it spinning, but it does not show up in the Finder. I have moved some critical files to it already, and formatting or swapping to a new one is not an option.
I was able to see my drive in the Disk Utility, although greyed out. It said Unmounted, but when I hit Mount button, nothing happens. It says that the drive is locked, but when I run WD Security, it says Security is not enabled for this drive.