Hello guys, I'd appreciate your help so I don't need to buy a new external hard drive! I have a Goflex 500gb external hard drive that I used with my old Windows PC, it has about 100gb of data that I want to keep from my windows PC, just videos, music, documents etc. I want to install Mountain Lion on my Macbook Air 2011, however, I want to make a backup of my data on my mac before hand incase it goes wrong. OSX wont let me use this hard drive at the moment, I think because it's formatted for Windows? I'm not the greatest with computers, I've not used any kind of cloud storage services as of yet. Can anyone think of a solution, how I could still keep this data that I have on my hard drive and still back up my mac using Time Machine with this hard drive? Money is a bit tight at the moment so I could do without buying another external hard drive, although it is something I'd like to do down the road for extra security! Thanks a lot.