Disguise the necessary files, notes, video player or camera under the calculator application, when you enter the supplied password in which the hidden application opens immediately. The data left under protection in this application will not be displayed anywhere else, so you can view or edit them only inside. In addition, if you are afraid of accidentally losing all your data, you have the option to make a backup and then restore them if lost. If you forgot your password, enter "11223344=" and continue the procedure.