The GZ-EX310 supports an SDXC memory card which is better than most medium sensor size video cameras that are a similar age to it. Most video cameras that were released more than two years ago support an SDHC memory card. SDXC cards are SD cards but with a much higher capacity and faster processing speeds. They have a maximum capacity of 2TB (Terabytes).
This video camera's memory card type (SDXC) is actually the best supported memory card type amongst all medium sensor size video cameras that have been around for a similar time to the GZ-EX310.
Amongst similar types of video camera the worst supported memory card type is MicroSD (Transflash).
SDHC cards are DS cards with a higher capacity of up to 32GB.