And does the installed firmware influence that? My M9 uses 16gb Sandisk Extreme SDHC class 10 type 1, 48MB/S cards now. I suspect they will work reasonably well, but if I'm going to buy some more cards, maybe I should upgrade to 32GB cards? I don't want all my eggs in one basket if a card fails so having a card to last a whole trip isn't necessarily a good thing in my mind. What do you think? What has your experience been?