I just saw this thread, being a newbie and all. SD cards are mostly 2 gigs or below, except for some special older ones that were 4 gig. If any of your electronics were designed and produced more than a year and a half ago, they will not support SDHC. I know, I have been scrambling to find and buy up all the 2 gig SD cards I can find for my Palm, Garmin, and Nikon. None of these will support SDHC.