I just bought the Airport recently and was really excited to try out the HD sharing. I have 2 400gb external drives and both of them do not show up when plugged in. They were originally formatted for use on my old Windows XP box (I just switched to Mac about 2 months ago). I'm wondering if this is the reason why they aren't detected? The light is always green on the Airport until I plug in a hard drive, then it switches to the flashing amber color. If I plug the hard drive into my MacBook Pro, it is detected and I can browse it but I don't seem to have access to delete files from it. If anyone has a suggestion for this Mac newbie, I'd appreciate it. Thanks!