Checking the speed by stupidly copying a 1.8 GB video file through the built-in card reader of a gaming laptop to an MVE type ssd disk (i. E., "the fastest") showed: - write speed to the card - at the level of 45 MB / s with short-term dips up to 30 MB / s, - and the speed of reading from the card is about 85 MB / s with short-term dips up to 65 MB / s, but they were so short that you can not notice and assume that they did not exist.
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