I have a 4tb internal hard drive, however 2TB's are only being used while the other "1.6" is unallocated. Disk Management wont give me an option to convert either of the partitions to GPT, which I believe is how to fix this. Currently build: https://pcpartpicker.com/list/rDr2Ft
Screenshot of my disk management: http://prntscr.com/jsgj90
Screenshot of my disk management: http://prntscr.com/jsgj90