a friend of mine has an external drive formatted FAT32. She plugged it into a Windows PC and after that it couldn't be read by the mac anymore. happened twice, so reformatting will most likely do nothing. i personally am on a macbook pro and the drive is recognized. what's the problem with her mac? btw. hers ibook G4 os 10.3.9 - i'm on a macbook pro running os 10.4.9