This is nice trick to hide files and files that hide using this way difficult to find.
1) select files that you want to hide and copy files in to new folder .
2) find some jpg image file and copy it in to above folder.
3) Compress files using compressing software (winrar ,winzip )
Except jpg image. (select files --> right click --> add to archive )
4)open command prompt and access to the folder which contain you r compressed file via command line .
5) then type bellow line
For the example my compressed file name is x.rar and my jpg file name is one.jpg
Then I type in command line
Copy /B x.rar + one .jpg secret.jpg
General form is : copy /B your compressed file name.extention + "your jpg file name".jpg "newnameforjpgfile".jpg
6) then exit from command line. And go to the folder you will see new jpg file call secret.jpg . It is the file that contain you r secret files so it larger than normal jpg.
7) when you want your secret files just extract secret.jpg using any extracting software (winrar,winzip)
*you can choose any file instead jpg to merge you secret files. Try .mp3 and .dat to do this.
That s all. I think this article may help you to protect your important files.