How to Format an SD Card in Your Canon EOS 6D
After you download images from your EOS 6D to your computer and back them up, it’s a good idea to format your cards before using them again, even if you didn’t fill them. Doing this ensures you’ll have a full card to work with and won’t download duplicate images when you download them to your computer. To format an SD card:
Insert the card into the camera.
Press the Menu button.
The last used camera menu displays on the LCD monitor.
Press the Multi-controller to navigate to the Camera Settings 1 tab.
Use the Multi-controller or the Quick Control dial to highlight Format.
The Format Card option is selected.
Press the Set button.
The menu changes to show the amount of data on the card and displays a warning that all data will be lost.
Rotate the Quick Control dial to highlight OK and press Set.
The card is formatted. After formatting, you have a blank card that's ready to capture images from the camera.
There is also an option called a Low-Level format, which totally erases all data on the card and resets it to its default condition. To enable Low-Level format, press the Erase button that looks like a garbage can to enable the feature and then perform Step 6. It’s a good idea to do a Low-Level format every now and again to restore your cards to an almost-new condition.
The only way you can restore images from a card that’s been formatted is with a data recovery program. Make sure you’ve downloaded all images to your computer before you format a card.
Press the shutter button halfway to exit the menu and resume taking pictures.