Canon EOS 7D Mark II Basic Instruction Manual page 93

3 Selecting the Card for Recording and Playback
Standard
Images will be recorded to the card selected with [Record/play].
Auto switch card
Same as with the [Standard] setting, but if the card becomes full,
the camera will automatically switch to the other card to record
images. When the card is automatically switched, a new folder will
be created.
Rec. separately
You can set the image-recording quality for each card (p.95). Each
image is recorded to both the CF and SD cards at the image-
recording quality you set. You can freely set the image-recording
quality, such as to 73 and 1, or c and 41.
Rec. to multiple
Each image is recorded to both the CF and SD cards simultaneously
at the same image size. You can also select RAW+JPEG.
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