This way usually use at school or campus. The aim is to make students can not copy and paste the file from computer in school to doing his task. So, students can do his task itself and not copy and paste from friend’s task. Yep, you can also use this trick to securing your file from stolen.

In fact, there are many applications that we use to hide files or important folder for not responsible person. However, most of it is paid. But, if you have no money to buy it you can use notepad to hide your file.