Formatting Memory Cards - Canon PowerShot G7 X Mark III Advanced User's Manual

Formatting Memory Cards

Before using a new memory card or a card formatted in another device, you
should format the card with this camera.
Low-level formatting may be helpful if the camera is not working correctly,
reading/writing of images on the memory card is slower, continuous
shooting is slower, or movie recording suddenly stops.
Both regular and low-level formatting erase all data on a memory card,
which cannot be recovered.
1
[Format card]
Format: [OK]
z
Low-level format:
z
→ [OK]
262
button to select [ ]