My Canon EOS 600D always stops recording videos after a while because the600D's class 10 SD card does not write out data very quickly and this results in buffering issues which can be seen when shooting burst or shooting 1080p video. Why can't the card keep up... What card would fit and what can I do to record 1080p@30fps withoutfix the risk of interruptionproblem? I'm already using a "Class 10" SD card.