Canon EOS 250D, Руководство для продвинутых пользователей

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Perform [Format card] in the following cases:
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The card is new.
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The card was formatted by a different camera or a computer.
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The card is full of images or data.
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A card-related error is displayed ( = 477).
Low-level Formatting
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Perform low-level formatting if the card’s writing or reading speed seems slow or
if you want to totally erase the data on the card.
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Since low-level formatting will format all recordable sectors on the card, the
formatting will take slightly longer than normal formatting.
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You can stop the low-level formatting by selecting
[Cancel]
. Even in this case,
normal formatting will already be complete and you can use the card as usual.
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Card’s file formats
SD/SDHC cards will be formatted in FAT32. SDXC cards will be formatted
in exFAT.
When shooting a movie with a card formatted in exFAT, the movie will be
recorded in a single file (instead of being split into multiple files) even if it
exceeds 4 GB. (The movie file will exceed 4 GB.)
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If you format an SDXC card with this camera and then insert it into another
camera, an error may be displayed and the card may become unusable.
Certain computer operating systems or card readers may not recognize a
card formatted in exFAT.
z
When the card is formatted or data is erased, only the file management
information is changed. The actual data is not completely erased. Be aware
of this when selling or discarding the card. When discarding the card, perform
low-level formatting or destroy the card physically to prevent personal data
from being leaked.