As everyone normally downloads some kind of software for hiding their files and also most of them won't work perfectly.
Here is a tutorial that how you can hide your private files in nokia s40 series without downloading any software.
1.Create any folder.(eg:-abc)
2.Move the files in "abc" folder which you want to hide.
3.Now rename the folder by giving extension at last ".jad".(eg:-abc.jad)
4.Now create a folder with the same name (abc) & give that folder .jar extension(eg:-abc.jar)
5.Now you will see that abc.jad is hidden now,it means that nobody cannot access your private documents.
6.Now for unhiding abc.jad just rename the folder "abc.jar" to "abc".
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