The JVC GZ-HM690 supports an SDXC memory card which is better than most camcorders of this age and type. Most video cameras that have been around for a comparable time to it support an SD memory card. This JVC camcorder 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 across all video cameras of this type and age.
The worst supported memory card type across similar types of video camera is MicroSDXC.
SDHC cards are DS cards with a higher capacity of up to 32GB.