I have a SanDisk 2gig flash drive which I have been using to move files between my work PC and my personal Macbook. It worked on both just fine until I upgraded the Macbook to Leopard. As far as I can guess that is the only thing different in the setup, and now if I use the flash drive on the Mac and then plug it into the PC it tells me the drive needs to be formatted. And the same vice versa. If I format it and put files from the PC on it and then plug it into the Mac now the Mac wants to format it. What's the deal? Is there a setting so I can use the drive on both computers? That is the point of having portable storage, and I know it worked in the past. I'd appreciate any help I can get. Thanks.