Hi all, I'm asking this on behalf of a freind who has a macbook running os9. She got an external disk drive that she initally formatted in windows to copy files that were on a win 7 machine. Now she wants to reformat this disk to work with her macbook - and I don't really have a clue about mac.* How to proceed? Is there any way to safeguard the data already on the disk? *Came to macrumours because of my iphone and stayed cause it's interesting and a change from my usual forums.