You might have important file and documents in your hard drive, and you want to protect these from the unauthorized access. There are two ways using which you can block the unauthorized access from your important files and documents. You can lock them using some file lock utility, and the other way is to move all those files in a single partition and just hide the partition so that know one could ever guess about your files.
Here is a little trick that I'm sure most of the users are not aware of.