Searched and found what you're looking for on
www.memorycardzoo.com tells you all about it so read it before trying. If you have trouble getting to the info type in search engine . What is SDHC card mean. search then click on the first in the row.
Copyright prevents me showing what I found.
All I can say is the SDHC is a new version of the SD card with higher capacity.
SD is Secure Dgital
SDHC is Secure Digital High Capasity.