Hide your data in a picture

If you want to hide data from others make it as a picture file nobody know that what is in it. Surprising thing is that the file behave as picture. When you double click on it, it open as picture.
Do this
step 1: Make a folder and put all your data in it.
step 2: compress that folder as .zip, .rar or any other format with any compressor software ( like, Winrar, Winzip etc)
step3: choose any picture file with jpg format
Note: Looking extension or file format you have to open "folder option" on "view tab" and uncheck "Hide extension for known file type" option. You'll find it in win7 "Organize button" on any opened folders.
step4: Open run command and type cmd and hit enter.
step5: write command
          copy/b   mypicture.jpg+myzipfile     newpicturefile.jpg

Where "mypicture" is the picture you want to show as file thumbnail and "myzipfile" is your data file which was compressed as .zip file and "newpicturefile.jpg" is made new file that hides your data.