Hey guys...sry for my stupid question, but i m kinda lost , tried searching the internet got found so many answers i cant decide which is the best....i got 2 External HDs , one is 200gb and one 1TB , and i wanna make them compatible with Mac OS, i used to own a PC with windows....which format should i select on Disk Utility ? ( notice that i got files also bigger than 4gb)...thanks so much !