I have 16 GB Flash Drive (USB), one day tried to make it bootable disk, i tried some command via DOS, the available space had been hidden, then i delete usb partition via windows xp and recreate. but now problem is that whenever i will copy any data from any system in usb and past other system so data will be corrupt, i tried a lots of software for repairing it but i didn't successes, now its requested to all friends plz help me. i will be thankful for this kindness.