Nikon Z8 - Slot Empty Release Lock

Slot Empty Release Lock
G buttonU
Bsetup menu
Choose whether the shutter can be released when no memory card is inserted in the camera.
Option Description
a
[Release locked] The shutt
er cannot be released when no memory card is inserted.
b
[Enable release]
The shutter can be released with no memory card inserted. No pictures
will be recorded; during playback, the camera displays [Demo].
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Slot Empty Release Lock