Canon WFT-R10 Advanced User's Manual page 71

Selecting the Size and Type of Images to Transfer
When recording in different sizes to the CFexpress and SD cards, or in RAW+JPEG or RAW
+HEIF shooting, you can specify how to transfer images.
1.
Display the [FTP transfer settings] screen.
2.
Select [Transfer type/size].
3.
Select the size of the images to transfer.
Perform the actions in steps 1 to 3 of
Each Shot.
Select [JPEG size to trans.], then select either [Larger JPEG] or
[SmallerJPEG].
To transfer smaller JPEGs when the camera is set to record larger
JPEGs to either the CFexpress or the SD card and smaller JPEGs to
the another card, set [JPEG size to trans.] to [SmallerJPEG].
Automatic Image Transfer After
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