Formatting The Card; Select [Format] - Canon Xsi Instruction Manual

Formatting the Card

3
If the card is new or was previously formatted by another camera or
personal computer, format the card with the camera.
Formatting the card will erase everything in the card. Even
protected images will be erased, so make sure there is
nothing you need to keep. If necessary, transfer the images to
a personal computer before formatting the card.
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Select [Format].

1
Under the [5] tab, select [Format],
then press <0>.
Format the card.
2
Select [OK], then press <0>.
The card will be formatted.
When the formatting is completed,
the menu will reappear.
For low-level formatting, press the
<L> button, checkmark [Low level
format] with <X>, then select [OK].