Zones without reader assignments are eligible to be archived.
That means that before you’re able to archive a zone you first need to unassign all readers associated with the zone you’d like to archive, and all its children shall it have child zones.
If you want to archive an NFC Dual reader or an NFC Quad reader, the same principle applies. The zone assignments for the ports would need to be unassigned before the zone can be archived.
Here's a quick step-by-step guide on how to unassign a zone from a reader.
