Canon EOS-1D X Mark III Advanced User's Manual page 601

9.
Specify a target folder.
Select [Root folder] to have images saved in the root folder, as
specified in FTP server settings (
Select [Select folder] to specify a target folder in the root folder. If the
folder does not exist, it is created automatically.
Select [OK] to go to the next screen.
The camera's <
When the following message appears, select [OK] to trust the target
server.
10.
Select [OK].
Not displayed in offline configuration.
).
> lamp is lit in green.
601