Installing and removing the CF card on the EOS 5D Mark IV

Article ID: ART174048 | Date published: 04/24/2019 | Date last updated: 04/24/2019


Installing and removing the CF card on the EOS 5D Mark IV


You can use a CF card and an SD card with this camera. Images can be recorded when at least one card is installed in the camera.
If cards are inserted in both slots, you can select which card to record images to or can record the same images simultaneously on both cards.
 If you use an SD card, be sure the card's write-protect switch is set upward to enable writing/erasing.

Installing the card

1. Open the cover.

  • Slide the cover as shown by the arrows to open it.

2. Insert the card.

  • The camera-front side slot is for a CF card, and the camera-back side slot is for an SD card.
  • The CF card is [] (Card 1) and the SD card is [] (Card 2).
  • With the CF card's label side facing you, insert the end with the small holes into the camera.
    If the card is inserted in the wrong way, it may damage the camera. 
  • The CF card eject button (gray) will stick out.
  • With the SD card's label facing you, push in the card until it clicks in place.

3. Close the cover.

  • Close the cover and slide it in the direction shown by the arrows until it snaps shut.
  • When you set the power switch is set to <ON>, the number of possible shots and the loaded card(s) will be displayed on the LCD panel.
    The images will be recorded to the card indicated by the arrow <> icon.
  • Type II CF cards, hard disk-type cards or CFast cards cannot be used.
  • Multimedia cards (MMC) cannot be used (card error will be displayed).
  • Ultra DMA (UDMA) CF cards can also be used with the camera. UDMA cards enable faster data writing.
  • SD, SDHC, and SDXC memory cards are supported. UHS-I SDHC or SDXC memory cards can also be used.
  • The number of possible shots varies depending on the remaining capacity of the card, the settings of image-recording quality, ISO speed, etc.
  • Setting [1: Release shutter without card] to [Disable] will prevent you from forgetting to insert a card.

Removing the card

1. Open the cover.

  • Set the power switch to <OFF>.
  • Check that the access lamp is off, then open the cover.
  • If [Recording...] is displayed on the LCD monitor, close the cover.

2. Remove the card.

  • To remove the CF card, push the eject button.
  • To remove the SD card, push it in gently and release it. Then pull it out.
  • Pull the card straight out., then close the cover.


During Live View shooting or movie shooting, if the red  icon appears, do not remove the card right away. The card may be hot due to the camera's high temperature. Set the power switch to <OFF> and stop shooting for a while. Then remove the card. If you take out the card while it is still hot after shooting, you may drop the card and damage it. Be careful when taking out the card.
  • When the access lamp is lit or blinking, it indicates that images are being written to, read from, or erased from the card, or data is being transferred. Do not open the card slot cover during this time. Also, never do any of the following while the access lamp is lit or blinking. Otherwise, it can damage the image data, card, or camera.
    • ​Removing the card.
    • Removing the battery.
    • Shaking or banging the camera around.
    • Unplugging and connecting a power cord (when household power outlet accessories (sold separately) are used).
  • ​If the card already contains recorded images, the image number might not start from 0001.
  • If a card-related error message is displayed on the LCD monitor, remove and reinstall the card. If the error persists, use a different card.
    If you can transfer all the images in the card to a personal computer, transfer all the images and then format the card. The card may then return to normal.
  • Do not touch the SD card's contacts with your fingers or metal objects. Do not expose the contacts to dust or water. If smudges adhere to the contacts, contact failure may result.

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