Canon EOS M200 Advanced User's Manual page 436

Format Card
Format the Card in the Following Cases:
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 ( = 495).
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Low-Level Formatting
Perform low-level formatting if the card's writing or reading speed seems
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slow or if you want to totally erase the data on the card.
Since low-level formatting will format all recordable sectors on the card,
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the formatting will take longer than normal formatting.
During low-level formatting, you can cancel formatting by selecting
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[Cancel]. Even in this case, normal formatting will already be complete
and you can use the card as usual.
Card's File Formats
SD/SDHC cards will be formatted in FAT32. SDXC cards will be
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formatted in exFAT.
When recording a movie with a card formatted in exFAT, the movie will
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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.)
It may not be possible to use SDXC cards formatted with this camera in other
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cameras. Also note that exFAT-formatted cards may not be recognized by some
computer operating systems or card readers.
Formatting or erasing data on a card does not completely erase the data. Be
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aware of this when selling or discarding the card. When disposing of cards, take
steps to protect personal information if necessary, as by physically destroying
cards.
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