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Message: <blockquote data-quote="Steve B" data-source="post: 322582" data-attributes="member: 15754">What were you copying to? Your slowdown may have been caused by something other than the card. The hump to the left shows that it is capable of higher speeds. The thing is the card manufacturers never state whether that is a "burst" speed or a sustained speed. Try copying just a couple of images and see what you get for a speed.Data transfer speeds are limited by whichever is slower, the read speed of the source or the write speed of the target. High speed bursts at the beginning are usually caused by cache somewhere in the pipe.</blockquote>