[Madelin]

I am trying to partition my 500GB external HDD into two partitions. One for my files, one for time machine.

When i try to make the Time Machine partition it gets 1/3 of the way through before reporting back that there is not enough space left. The exhdd has ~300GB of free space, im trying to make a 175GB time machine partition.

I heard that parallels may be causing these errors. So i uninstalled parallels and tried again. This time 1/3 of the way through, my screen darkens and a message appears telling me i need to restart my Mac.

Whats going on? How can i partition my external harddrive?