ok so I have a mybook external hard drive right now currently in FAT32
I first plugged it into my macbookpro then my girlfriend needed some music so i took it to her computer that is a Virus ridden Windows bought at WALMART
so here is the question is there a chance that a virus could have passed through to my external hardrive and would it be smart to reformart it in a way that it only works on mac and not windows.