There are a variety of free and paid third-party encryption tools available if the options built into Windows and macOS don't suit your needs, including Cryptomator, NordLocker, and AxCrypt.

Have a private document on your desktop OS? Here's how to keep it secure on Linux, MacOS, and Windows.

Here’s a basic introduction to encryption, when you should use it, and how to set it up. What Is Encryption? Encryption is a method of protecting data from people you don’t want to see it.