Why measuring free and used disk space is not so simple in APFS, and which estimates you should trust.
clone
Adding volumes in APFS is quick and simple. But why would you ever want to add a container to a disk? An exploration of their differences, and when containers are useful.
It’s worth refreshing all your Finder Aliases before copying or cloning a volume to update their link info. Here’s a free tool to do that and more: Alifix.
I’m sure this used to be much easier in HFS+, but here’s a detailed set of instructions for making a bootable clone in High Sierra or Mojave, for an APFS disk.
Don’t just throw it in a box and send it off: what happens if its internal storage is replaced or wiped? What about protecting sensitive files? Does a T2 chip make this difficult?
What if you can’t or don’t want to use Migration Assistant to move your files from your old to a new Mac? Here it can get more complicated. Tips and solutions to help.
Do you know when it would be best to use a hard link? What’s the difference between a Finder alias and a symbolic link? And where to High Sierra’s new clones fit in?
Does APFS support its major new features – clones, snapshots, etc – yet, and how can you use them?
How often, and how much? Decide by thinking through how you would use your backup to restore your Mac after disaster.
The Eclectic Light Company 