Can't add an APFS volume as a Time Machine backup?
I bought a new external drive to use for storage and backup. I was planning to partition it, as I'd done with previous disks, into two pieces. Then I learned from Disk Utility that nifty APFS formatting is more flexible than old-fashioned partitioning, so I chose to create 1 volume for laptop backup and 1 volume for extra storage.
Now, I'm unable to add the newly created volume in the Time Machine Preferences.
- Did I do something wrong and/or is APFS the wrong choice for Time Machine? As a workaround,
- I tried going back to Disk Utility to reformat the drive as an old-fashioned file system, but I can't figure out how. Selecting either volume and choosing Erase only gives me APFS options. Unlike in the old file system style, I can't select the 'parent' hard drive containing the volumes to start all over again. How might I do so?
Thanks so much for your help :)
MacBook Air 13″, macOS 10.13