Canon EOS 70DN Basic Instruction Manual page 654

Sending Images
If playback or shooting operation is started during the connection, he
connection will be terminated. Operations such as shooting cannot be
performed when data is being sent or received. When [Cancel] is
selected on the camera being used to send images, image transfer is
stopped so that shooting and other operations can be performed.
When sending a large number of images or large files (total size), make
sure that the battery is adequately charged so it does not run out during
the process.
RAW images cannot be sent.
You can select up to 50 files.
20
4
Reduce the image size.
Set it if necessary.
5
Send the images.
Press the <V> key to select [Send],
then press <0> to send the images.
The transfer progress screen is
displayed.
To transfer other images, repeat
steps 1 to 5.
6
Terminate connection.
Press the <M> button to display
the confirmation screen. Press the
<U> key to select [OK], then press
<0> to terminate the connection.
The [Wi-Fi function] screen will
reappear.