Nikon D3400 - Send to Smart Device (Auto); Bluetooth

223B The Setup Menu: Camera Setup
If On is selected, new photos will automatically be uploaded to
the smart device (if the camera is not currently connected to the
smart device, the photos will be marked for upload and
uploaded the next time a wireless connection is established).
Movies are not uploaded.
List paired devices and adjust settings for connection to smart
devices.
Send to Smart Device (Auto)
G button ➜ B setup menu
A Upload Marking
No more than 1000 photos can be marked for upload at a time.
Before changing the rating of photos that are marked for upload,
select Disable for Bluetooth > Network connection or switch
wireless off by selecting Enable for Airplane mode.
Bluetooth
G button ➜ B setup menu
Option Description
Network
connection
Enable or disable Bluetooth.
Paired devices View paired devices.
Send while off
Select Off to suspend wireless transmissions when
the camera is turned off or the standby timer expires.