I have a new car stereo and it accepts SD cards to play music from. I have almost 4GB of music I'd like to put on a card to play in the car, but anything more than 2GB seems to come on SDHC cards. Are there any huge differences and would my stereo take an SDHC card? There is nothing on the stereo or its instructions to indicate otherwise, just the standard SD logo. The description on the Argos website doesn't even mention SD in it, but it does take them and the box mentions the card slot, but just SD, not SDHC. 
The stereo is this one - Click Here

The stereo is this one - Click Here