I love Cryptomator. Cryptomator is an app that sits on top of your cloud storage provider of choice and provides encrypted vaults to store your more sensitive files. It's great. It's convenient. The apps are beautiful. Files are written individually (with filenames encrypted), unlike options like VeraCrypt where you are creating a single encrypted volume, so syncing is efficient. I like the separation of storage and security (seems like a lot of things would have to go wrong for someone to steal my more sensitive files).