I have an old 120gig hard drive in my PC desktop I would like to put in an external enclosure for use with my MacBook. THe hard drive is NTFS. Am I supposed to format the hard drive, then place it in the enclosure? Or can I just put in the enclosure, connect it to my macbook and my macbook take care of everything? Also, if I get an enclosure with FW800 ports, will it also work with my macbook if it is only FW400 capable? Thanks in advance.