Don’t use cloud backup services to make copies of your Time Machine volumes

Glenn Fleishman for Macworld:Time Machine is a simple and generally effective way to make an ongoing archive of a Mac’s files and folder structure. But it’s only a single copy of your data… That single, on-site copy is a problem. It’s why I’ve recommended for many years that people also use a cloud-based backup service that has robust encryption.
Now you might think that on top of that belt and suspenders (Time Machine or a local copy plus cloud archives), you shou