You should be backing up your Mac in more than one way — try threeHow do you back up your Mac locally and off-site or online so all your important photos and files stay safe and sound? Like this!
You absolutely have to back up your Mac. If you don't, one day — maybe tomorrow, maybe next week or next year — you will lose something important and irreplaceable and there will be nothing future you can do but curse at and blame past you. I don't say this to scare you. I say it to save you. Back up. Do it now. And do it like this.
Why do you need to back up?
One copy of your data is no copies at all. That's because hard drives and solid state drives (SSD) fail. They fail all the time. Two copies of your data is basically one copy, since there's a chance both could fail at the same time.
To make sure your data is safe you want to back it up in a way that minimizes the chance you could ever lose it. Realistically, that means a local back up as well as an off-site or online backup.
What's a local back up and how do you do it?
A local back up is ...
Source:
You should be backing up your Mac in more than one way — try three
