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