I did this several weeks ago while preparing my MacBook Pro for a system update. You should back up your Mac on a regular basis, especially if you’re planning to perform macOS updates. In this article, I’m going to show you how to back up your Mac data to an external drive. If you read my previous post about how to format an external drive for Mac, you know that I bought a 2TB Seagate Expansion external hard drive and managed to create two partitions on the disk - one for Mac backup purposes, and the other for personal use.
