However, while the default is for only you to be able to access them, there is the option to share specific files (opens in new tab) and folders with other users.
You can choose which files and folders to include, and these will become locked and encrypted. Microsoft OneDrive may not be the first option that comes to people's minds when they think of encryption software, but what a lot of people don't realize is that it comes with its own secure and encrypted file storage area in the form of the Personal Vault.