I'm thinking about getting an external HD for my Mac, but I also would want to use it with a PC for moving files around. However, I don't want to pay a premium for a Mac specific product if I can use a regular version . So, are there any external HDs that will work out of the box on both Mac and PC? I've heard about NTFS-3G that will enable NTFS drives to be read on the Mac, are there any formats that are compatible between both platforms? Thanks .