Make a new file folder or you may use any existing file folder that is to be hidden .
Rename the file folder to any kind of name but with the extension of .jad just like if I wish to hide my images file folder then I will name it as IMG .jad
Now make a fresh folder with the exact same name in the same directory but with the extension of .jar So , I would make the file folder with the title IMG .jar
Or thats it ! ! My orignal images file folder which has been renamed with .jad gets hidden and only folder with .jar extension is visible which is blank .So ,my data is protected/hidden from unnecessary eyes .
This technique can be utilized for any JAVA phone from Nokia ,Samsung ,Motorola ,LG or any other company .
To unhide the orignal folder you have to remove the .jar extension from the new folder and your orignal folder with all the files and with .jad will become visible.