APFS format doesn't work with Airport Extreme Base Station in Big Sur
I used Disk Utility to format a new 8TB Seagate HD as APFS, then connected it to the USB port of my Airport Extreme Base Station A1521.
I used Finder to connect to the Base Station but was unable to see the drive. However I was able to see a 2nd non-APFS HD connected to the 8TB APFS drive's extension port.
When I reformatted the 8TB drive as Mac OS Extended Journaled GUID, the drive appeared in the Finder and Time Machine was able to access it.
How can I get Big Sur to recognize the APFS formatted drive so Time Machine can use that format, as recommended by Apple for Big Sur: https://support.apple.com/guide/mac-help/types-of-disks-you-can-use-with-time-machine-mh15139/mac
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