Yeah, as you can see above, I used my HDD as a backup drive to my new macbook air, but here's the problem. After it reformated my HDD, I wanna used my HDD to transfer some files from my friends, of his Windows PC and mine just can't detect the HDD, I need you guy's help to guide me to let Windows PC to detect my HDD or just simply reformat it back to Window's PC format. Thanks~ Please reply me as soon as possible!!