my friend was using her laptop [winXP] with the usb 60m flash drive inserted. while the laptop ran out of battery and automatically shutted down, the usb flash was not unplugged. but when she turns on the computer again, the files in the flash drive dissappeared. but the properties showed that 20mb is used and 40mb free. she had tried on other computers but it's the same result. can anyone help please?? thank you very much!!!!!!!!!