I recently upgraded from a 360 elite to slim. To transfer my data, I used a Western Digital 320gig portable HD. I formatted the drive and transfered all my data. Before I had a chance to transfer the data to my new slim, I needed to use the hard drive for other purposes. I therefore copied all my files to my pc, re-formatted the drive to ntfs and went on my merry way. Now that I am ready to transfer the data to my slim, I cannot. I have reformatted the drive to the appropriate format (via my 360) and transfered the files from my pc (back to my portable hd). However, when I plug my usb drive into my 360, it is no longer formatted properly and I am asked to reformat. I would swear that I've done this exact same thing for a buddy of mine and didn't have this issue. What am I doing wrong? Should this work? I've tried copying the xbox 360 folder to the drive, as well as just copying the files contained in the folder. When I plug the drive into my 360, I am always asked to format the drive (even though it is properly formatted). Any help would be appreciated!