Canon EOS M200 Advanced User's Manual page 210

Movie Recording Quality
Cards that Can Record Movies
For details on cards you can use for various movie recording sizes, see
= 499.
When recording movies, use a high-capacity card with a writing and reading
speed (as specified in card performance requirements) shown in the
table on = 499 or higher than the standard specification. Test cards by
recording a few movies to make sure they can record correctly at your
specified size ( = 207).
Format cards before recording 4K movies ( = 435).
z
If you use a slow-writing card when recording movies, the movie may not be
z
recorded properly. Also, if you play back a movie on a card with a slow reading
speed, the movie may not be played back properly.
When recording movies, use high-performance cards with a writing speed
z
sufficiently higher than the bit rate.
When movies cannot be recorded normally, format the card and try again.
z
If formatting the card does not resolve the problem, refer to the card
manufacturer's website, etc.
To obtain better performance with the card, formatting the card with the camera
z
before recording movies is recommended ( = 435).
To check the card's writing and reading speed, refer to the card manufacturer's
z
website, etc.
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