Nikon 13187 User Guide (en)

Using Two Memory Cards
When two memory cards are inserted in the camera, you can use the Role played by 
card in Slot 2 
item in the shooting menu to choose the role played by the card in Slot 
2. Choose from Overflow (the card in Slot 2 is used only when the card in Slot 1 is 
full), Backup (each picture is recorded twice, once to the card in Slot 1 and again to 
the card in Slot 2), and RAW Slot 1—JPEG Slot 2 (as for Backup, except that the NEF/
RAW copies of photos recorded at settings of NEF/RAW + JPEG are recorded only to 
the card in Slot 1 and the JPEG copies only to the card in Slot 2).
“Backup” and “RAW Slot 1—JPEG Slot 2”
The camera shows the number of exposures remaining on the card with the least amount of 
memory. Shutter release will be disabled when either card is full.
Recording Movies
When two memory cards are inserted in the camera, the slot used to record movies can be 
selected using the Movie settings Destination option in the shooting menu (