Canon EOS-1D X Mark III Advanced User's Manual page 607

Note
During continuous shooting, images are transferred to the FTP server in the order
they are captured.
Captured images are also stored on the card.
Any images for which transfer fails or is interrupted will be transferred automatically
when the connection is recovered (
together manually at a later time (
Any changes to network settings (such as FTP server settings) before automatic
FTP transfer begins will prevent automatic transfer.
Transferring the current image
Enables you to transfer the image you are viewing simply by pressing <
continue shooting still photos as usual while images are being transferred.
1.
Access the [FTP transfer settings] screen.
2.
Select [Transfer with SET].
3.
Select [Enable].
Follow steps 1–3 in
). These images can also be transferred
).
Automatic transfer after each
607
>. You can
shot.