Hello guys, I'll try to describe my problem most aptly. I have an external HDD (Western Digital My Book Essential 3000GB), which I formatted in exFAT format so I could use it on both Mac and Windows systems. The hard drive was working just fine until I unplugged it from my Mac and it showed a message that the disc was not ejected properly (something like this: https://discussions.apple.com/servl...Shot-2013-12-28-disk-not-ejected-properly.jpg) From that time, when I plug it into my Mac, it isn't shown in the finder and when I go into the Disc Utility, it's there, but it says that the drive has not been mounted. However, I tried it to plug it into my Windows laptop and the HDD is working just fine. I've, of course, tried the first aid help, but with no success. Can you guys help me resolve this issue? Thanks a lot in advance.