Time Machine or another local backup tool for macOS should be your first line of defense. You should always have a way to recover if you delete an important file or if your hard drive fails. But backup hard drives can go bad. What’s more, if you have a major catastrophe, like a robbery, house fire, or flood, you could lose your backups along with your primaries. To make sure your backup strategy is complete, you need to take it offsite and a simple way of doing that is to take it online. That’s right — to the cloud!
How to back up your Mac to the cloud | iMore