How to hide files on your phone without application

go to your gallery or
application and create a folder. name the folder
[sampa.jad] and move
ur files into that folder. create
another folder
[sampa.jar]...but don't
put any file in it but let the name be the same.
you will notice that the
sampa.jad will
disappear. To bring your
sampa.jad back, you need to
rename your sampa.jar
to sampa.ja