Sdhc To Sd Howto What Is The Difference Between SD And SDHC Memory Card?

What is the difference between SD and SDHC memory card? - sdhc to sd howto

I bought a Canon PowerShot A590 IS and I wonder whether I SDHC cards or only SD cards can be used? What is the difference between these two? I saw a SanDisk 8GB SDHC card $ 19.99 and I think it's a good deal.