Here is tutorial that explains how to use Truecrypt software to protect your computer files.
Truecrypt is freeware open source software that allows you to encrypt your files , such way that they cannot be used by anybody else, without using your password. We’ll create virtual disk , and all files stored on the virtual disk will be protected with password. The same way you can protect the files on your USB disk .
Download TrueCrypt from this LINK and install it on your computer.
I created encrypted file container , virtual encrypted disk , but if you like you can encrypt non-system drive as USB disk or encrypt entire system drive.
There are 2 option Standard and Hidden TrueCrypt volume . I chose standard.
The purpose of hidden volume is that instead one password you have two , so that if you’re ever forced to give up password you can give them the password that open fake files , not your real files.
Click Select File to choose a filename for the container and to select the location where you wish the container to be created. If you select an existing file, Truecrypt will not encrypt it , the file will be deleted and replaced with the newly created Truecrypt container.
You’ll be able to encrypt existing files later on by moving them to the TrueCrypt container that you’re about to create now.
Move your mouse to create random encryption key and click on format.
Go to main windows of the Truecrypt and select TrueCrypt file that you created in steps above , click on Mount. Type your password and virtual encryption disk will be created.