Can a external hard drive store music from both my apple powerbook g4 and my microsoft pc. both run itunes?

I have a powerbook g4 and a normal laptop microsoft pc and loads of music! i really want to store both pcs music files that are both on itunes on to the external hard drive so a. is this possible and b. how do i do it! many thanks for your help!
Answer
If both laptops have usb ports and ur external hard drive plugs into the usb port then yes it should work