1. The USB flash drive file becomes garbled, which may be caused by a virus. It is suggested to upgrade the anti-virus software of the computer and conduct a comprehensive killing of the computer.

2. download the USB flash drive-killing software such as Kingsoft Internet Security, completely kill the USB flash drive, and then recover the files of the USB flash drive, so that the files of the USB flash drive can be recovered and opened.

second, it may be an expansion disk. if it is an expansion disk, it is necessary to mass-produce the U disk to restore its actual capacity and prevent the U disk from becoming garbled again after exceeding its actual capacity.