Secondary Slot Function

G button U C photo shooting menu

Choose the role played by the card in the secondary slot when two memory cards are inserted in the camera.

Option		Description
P	[Overflow]	The card in the secondary slot is used only when the card in the primary slot is full.
Q	[Backup]	Each picture is recorded twice, once to the card in the primary slot and again to the card in the secondary slot.
R	[RAW primary - JPEG secondary]	This option is available when [SDR] is selected for tone mode. NEF (RAW) copies of photos taken at settings of RAW + JPEG are recorded only to the card in the primary slot, JPEG copies only to the card in the secondary slot. Pictures taken at other image quality settings are recorded twice at the same setting, once to the card in the primary slot and again to the card in the secondary slot.
O	[JPEG primary - JPEG secondary]	This option is available when [SDR] is selected for tone mode. Two JPEG copies are recorded, one to each memory card. The copy saved to the card in the primary slot is recorded at the image quality and size selected in the photo shooting menu. The copy saved to the card in the secondary slot is saved at an image quality of [JPEG/HEIF basic] and a size of either [Medium] or [Small]. The size can be selected by pressing 2 when [JPEG primary - JPEG secondary] is highlighted. At image qualities of RAW or RAW +, this option is equivalent to [Backup].
a	[RAW primary - HEIF secondary]	This option is available when [HLG] is selected for tone mode. NEF (RAW) copies of photos taken at settings of RAW + HEIF are recorded only to the card in the primary slot, HEIF copies only to the card in the secondary slot. Pictures taken at other image quality settings are recorded twice at the same setting, once to the card in the primary slot and again to the card in the secondary slot.
b	[HEIF primary - HEIF secondary]	This option is available when [HLG] is selected for tone mode. Two HEIF copies are recorded, one to each memory card. The copy saved to the card in the primary slot is recorded at the image quality and size selected in the photo shooting menu. The copy saved to the card in the secondary slot is saved at an image quality of [JPEG/HEIF basic] and a size of either [Medium] or [Small]. The size can be selected by pressing 2 when [HEIF primary - HEIF secondary] is highlighted. At image qualities of RAW or RAW +, this option is equivalent to [Backup].

Caution: “RAW Primary - JPEG Secondary”

If [ON] is selected for [Multiple exposure] > [Save individual pictures (RAW)] in the photo shooting menu, or if [ON] is selected for [HDR overlay] > [Save individual pictures (RAW)] in the photo shooting menu, unprocessed copies of the individual NEF (RAW) photos that make up each multiple exposure or HDR picture will be recorded to both memory cards together with the JPEG composite, regardless of the option selected for image quality.

When an Option Other than “Overflow” Is Selected

The shooting display shows the number of exposures remaining on the card with the least amount of space available.
The shutter release is disabled when either card is full.

Viewing Dual-Format Photos

Use the [Dual-format recording PB slot] item in the playback menu to choose the slot from which dual-format photos are played back.
When viewing dual-format photos, you can view the other copy using [Jump to copy on other card] in the i menu.

Recording Videos

The slot to which videos are recorded is selected using [Destination] in the video recording menu.

Deleting Copies

When deleting pictures recorded using [Backup], [RAW primary - JPEG secondary], [JPEG primary - JPEG secondary], [RAW primary - HEIF secondary], or [HEIF primary - HEIF secondary], you have the choice of erasing either both copies or only the copy on the card in the current slot.

Pressing O when a picture created using either of these options is highlighted during playback displays a confirmation message.
To delete only the copy on the card in the current slot, highlight [Selected picture] and press O again.
To delete both copies, highlight [Same pictures on x & z] and press O.
If a voice memo is appended to the picture, a confirmation dialog will be displayed. To delete only the voice memo, highlight [Voice memo only] and press O.

Delete Options

Use the [Delete pictures from both slots] item in the playback menu to choose the options displayed when a picture is deleted.