I pulled the hard drive out of my old PC and am considering putting it in a hard drive enclosure to use as an external hard drive. What do I need to know about the hard drive in order to get the right enclosure? Will my Mac be able to read any files off of it if it came straight out of a windows XP PC? As in, can I access a few files on it before I reformat, or do I have to reformat before I can use it at all? Lastly, how hard is it to put a hard drive in an enclosure? Does the enclosure have to have a power plug or can this hard drive be bus powered if I get the right enclosure? Attached is a picture of the hard drive.