How to create a hidden folder in your nokia s40 handset.

Open a folder and create a folder named a.jad
Open A.jad and put all ur personal files into that folder.
Close that folder(a.jad)
Create another folder named a.jar an save it
Wow! That a.jad folder become hide.

How To unhide

Rename the A.jar folder as A
Wow its shown
Note: Dont delete A.jar.because its hide the folder A.jad
Its done in all versions of NOKIA s40 handset