Hey, guys. Ummmmm....I have a problem. My personal flash drive (the only one I have) has very important files on it. This wouldn't be a problem except...I have to give it to my teacher. I'm afraid that she might delete all of the files on there or something, and I don't want to lose the stuff I have. Is there a program that you can put on a flash drive that will prevent deletion of certain folders and files without a password? After the program's usefulness is over, will I be able to remove the encryption off of these certain folders and files?