I have two xboxes, one being a newer black model and one of the older white models. I have formatted a USB drive on the newer xbox and it works firne. I am able to transfer content and saves to the older xbox without problems. The problem is that if I plug the USB drive into the newer xbox after content was added from the old xbox, it complains that the USB drive isn't formatted. If I return it to the old xbox, it is still unformatted. Could this be specific to the USB device I am using or will it do this for all USB devices? Is there a way around this as the newer box doesn't have a memory card slot.