Memory Card Canon

Memory Card Canon
What is the best memory card for my Digital Camera Canon G10? I'm confused about the difference between?

a Sandisk 8 GB. Extreme III (Class 6) vs SDHC card 20mb/second @ @ 30mb/second the same card. What is the real world difference between these two? What exactly would be more Quick on the card of 30 MB / s, and how?

The difference is how fast the card can read and write image files. However, the G-10 can not be able to withstand that kind of speed and 8 gb is frankly too big for a card from a P & S camera. Given a false sense of safety and you 1) rarely copy image files on your computer and format the card when finished and 2) run the risk of corruption final card, losing all your images. It is best to buy only one pair of cards of 2 GB (about $ 10 to $ 15 on a package of two) and use one as a backup if you run out of space on it in crossfire.

1/2: Canon 1D Mark IV Continuous Burst @ 10 FPS (with a slow SD memory card)