The JVC GY-HM200 supports an SDXC memory card which is better than the SDHC memory card supported by most big sensor size video cameras that were launched more than a year ago. 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 amongst all big sensor size video cameras that are a similar age to the GY-HM200.
The worst supported memory card type across similar types of video camera is SD.
SDHC cards are DS cards with a higher capacity of up to 32GB.