Canon WFT-R10A Wireless File Transmitter for EOS R5 C & R5 Mirrorless Camera - 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.
Perform the actions in steps 1 to 3 of Automatic Image Transfer After
Each Shot .
2.
Select [Transfer type/size].
3.
Select the size of the images to transfer.
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 ].
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