Step 1 : First choose those files which you want to hide and keep them in a folder say hidden
Step 2 : Now compress that folder in .rar or .zip folder now it becomes hidden.rar/.zip.
You can provide more security by giving password to that file.
Step 3 : Now copy any image file in the same location where hidden.rar/.zip placed.
I recommended to use .jpg file. here lets say pics.jpg
Step 4 : Open Command prompt change the location to your directory which contain both files
rar and jpg. using cd
Step 5 : then type copy /b picturename.jpg + filename.rar outputfilename.jpg
here copy /b pics.jpg + hidden.rar final.jpg
Step 6 : Now you should appear a file named final.jpg. anyone open it is able to see picture only.
Step 7 : Now to get back your data you can either open that image in your archive application. or
In command prompt type ren hiddenfilename.jpg outputfilename.rar/.zip
thanks u ..