Canon EOS-1D X Mark III DSLR Camera (Body Only) - Manual (Page 610)

4.
Select the type of images to transfer.
RAW+JPEG transfer
• Select [ RAW+JPEG transfer ], then select [ JPEG only ], [ RAW
only ], or [ RAW+JPEG ].
RAW+HEIF transfer
• Select [ RAW+HEIF transfer ], then select [ HEIF only ], [ RAW only ],
or [ RAW+HEIF ].
610