(This encryption tool is copied to the root directory of your U disk or mobile hard disk (not in a folder), then it can encrypt and hide all files on the U disk or mobile hard disk. After encryption, you can't see your files in the U disk or mobile hard disk, you can only see this tool. But it does not affect your operation of the U disk or mobile hard disk, your newly created files will be encrypted at the same time in the next encryption. If you or someone else accidentally deletes this tool, be assured that your encrypted files are still there, as long as you copy this tool again and use your original password to open it.)