The JVC GY-HMQ10 supports an SDXC memory card which is better than the SDHC memory card supported by most medium sensor size camcorders that were launched around the same time as it. SDXC cards are SD cards but with a much higher capacity and faster processing speeds. They have a maximum capacity of 2TB (Terabytes).
An SDXC memory card is in fact the best supported memory card type across all camcorders of this type and age.
The worst supported memory card type across comparable types of camcorder is MicroSDXC.
SDHC cards are DS cards with a higher capacity of up to 32GB.