Hi everyone, After having an external HD fail on me and losing all of my data, I decided to get a 4TB G-Drive to use as my dedicated Time Machine drive. I have another 3TB G-Drive that I'll be using to store data to replace the failed drive. I want to use the 4TB Time Machine drive to backup the data from the 3TB drive but when I go to Time Machine preferences, that drive is greyed out and can't be included. The drive is already formated for Mac from the factory so I'm not sure why it's greyed out. Can someone help?? Thanks in advance.