i am trying to figure out how to lock a file on a usb key so it can't be deleted. i have a usb key and have some documents on it... and i want to make it so the files are undeletable. i understand that if someone had the know how, they could format the usb key and that is fine... but i want to make it so that people can't Select -> Delete the files. does anyone know a good program to help me achieve this by chance? i've tried google and a few different shareware programs and none have done the trick so far... they seem to lock it but then i plug the key into another PC and can delete the files. i am not worried about cost, so it doesnt have to be a free program... just something effective and easy to use!