Hey guys! So, here are to pictures: I have like, 93GBs in use on my MacBook Pro, and 172 available on my external hard drive, but it says that I need to reformat the external. Most of the stuff on the external are things that aren't on my computer, that I can't get rid of. I'm wondering if there's a way to use Time Machine, without erasing/reformatting my external hard drive, because I have the space, so I don't see why I need to. Thanks for the help guys!