Create and mount strongly encrypted volumes for any folder or drive, with VeraCrypt
VeraCrypt is a free and reliable program that will let you create encrypted volumes for any of your folders or drives. It supports on-the-fly encryption, which means that your files are encrypted right when they are saved and decrypted whenever you open them, automatically, without you doing anything at all. Your files are not readable unless a user knows the right password or encryption keys. Everything is protected with strong encryption algorithms — file and folder names, the contents of your files, their meta data, etc).
Files are moved or copied being automatically encrypted or decrypted from or to encrypted volumes. Even when the volume is mounted, data remain encrypted and they are decrypted only on the fly, whenever you open a file. Note that you have to mount again any encrypted volume on a new Windows session; they won’t remain mounted if you shutdown Windows or even if a power failure terminates PC use.
VeraCrypt can help you with wizards for anything. You can use it to create any number of partitions / volumes, depending on the available space. You can use the program to create empty volumes or encrypt existing folders on your system or the whole drive. VeraCrypt provides AES, Serpent and Twofish encryption, as well as combinations of those methods.
Note that the security of VeraCrypt overcomes problems of TrueCrypt, and the program is able to use TrueCrypt volumes, even convert them to the VeraCrypt format.