Over the years I’ve found a few cool tools. So now I’m gonna share the best with you. Here’s number one: TrueCrypt.
TrueCrypt provides full disk and virtual volume encryption for Windows, Mac, and Linux. It’s easy to install and easy to use. TrueCrypt can create an encrypted file and mounts it as a drive. You drop the files in that you want to protect, then un-mount the drive. Your secrets are safe. Not even the NSA can break in if your password is sufficiently strong.
I’ve been using it for years before I back stuff up into the cloud. Check it out.