The JVC GZ-E300 supports an SDXC memory card which is better than most video cameras of this age and spec. Most video cameras that were released more than two years ago support an SD memory card. In addition, this video camera 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 in fact the best supported memory card type across all similar spec video cameras that came out around the same time as the GZ-E300.
The worst supported memory card type across comparable types of video camera is MicroSD (Transflash).
SDHC cards are DS cards with a higher capacity of up to 32GB.