The camera has no internal memory; instead, pictures are stored on optional SD, SDHC, and SDXC memory cards (sold separately). The camera can be used with two cards, one in each of its two slots. Movies are recorded only to the card in the first slot, which supports UHS-II.
Open the memory card slot cover.
Do not open the memory card slot cover when the camera is on. Failure to observe this precaution could damage image files or memory cards.
Insert a memory card.
Holding the memory card in the orientation shown, slide it in until it clicks into place at the back of the first slot (if you are using two cards, insert the second card into second slot).
Be sure card is in the correct orientation; do not insert at an angle or use force.
Close the memory card slot cover.
Removing Memory Cards
Before removing memory cards, turn the camera off and open the memory card slot cover.
To remove a memory card, press it in and release it slowly. The card can then be removed by hand. When a memory card is removed, the card could be ejected too quickly. Use your finger to hold it and gently release the card.
Press center of card
At default settings, the card in the second slot is used only if the card in the first slot is full (SEQUENTIAL). This can be changed using SAVE DATA SETTING > CARD SLOT SETTING (STILL IMAGE).
The card in the second slot is used only when the card in the first slot is full.
If the second slot is selected for SAVE DATA SETTING > SWITCH SLOT (SEQUENTIAL), recording will start on the card in the second slot and switch to the first slot when the card in the second slot is full.
Each picture is recorded twice, once to each card.
As for SEQUENTIAL, except that the RAW copy of pictures taken with FINE + RAW or NORMAL + RAW selected for IMAGE QUALITY SETTING > IMAGE QUALITY will be saved to the card in the first slot and the JPEG copy to the card in the second slot.
Movies
Regardless of the option selected for CARD SLOT SETTING (STILL IMAGE), movies will be recorded to the card in the first slot; if SEQUENTIAL is selected, movies will be recorded to the card in the first slot even after recording has moved on to the card in the second slot.