Canon POWERSHOT A810 User Manual page 18

Adjusting Basic Camera Functions
@ Low=Level Formatting
Perform low-level formatting in these cases: [Memory card error] is displayed,
the camera is not working correctly, card image reading/writing is slower,
continuous shooting is slower, or movie recording suddenly stops. Lowqevel
formatting erases all data on a memory card. Before low-level formatting,
copy images on the memory card to a computer, or take other steps to back
them up.
Perform low=level formatting.
On the screen in step 2 on p. I26, press the
,_v buttons to choose [Low Level Format],
and then select this option (mark with a *_/* )
by pressing the 4)' buttons.
Press the ,,L'_ _ _ buttons to choose [OK],
press the @ button, and then follow step 3
on p. 126 to format (low-level format) the
memory card.
because data is erased from all storage regions of the memory card.
You can cancel low-level formatting in progress by choosing [Stop]. In this case,
all data will be erased, but the memory card can be used normally.
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