Hi all, I have a WD Passport Portable hard drive which I use as a Time Machine for my iMac. I'm close to filling it up and I will be getting a bigger hard drive for it. I would like to use my WD hard drive again on my daughters PC so she can save her school work. I know it needs to be re-formatted to work with a PC again but I dont know how to do it. Any help will be great, thank you in advance.