Tips to save the file confidential / private

Often we keep files confidential, but easily opened and accessed by people around us (who uses a computer / network)
therefore, there are tricks and tips telling us that the file could not be opened and accessed by others
How to store confidential files:
1.rename your confidential files and change the extension ... eg previous file "jpg" to file ". doc" files or other
2.Exctract file to the file "zip" or ". rar" and do not forget the password was given when exctract file ....
3.rename file already in exctract (". Zip" / ".rar")
Your file is guaranteed to be super secret .......
if want to open the file just click the right-with-open-winrar ...... ok ....