The GZ-HM670 supports an SDXC memory card which is better than most video cameras of this age and type. Most video cameras that were released around the same time as it support an SD memory card. This video camera also supports 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 video cameras that have been around for more than two years.
A MicroSDXC memory card is the worst supported memory card type amongst comparable types of video camera.
SDHC cards are DS cards with a higher capacity of up to 32GB.