The GY-HM600 supports an SDXC compatible memory cards which is better than most comparable spec camcorders that have been on the market for more than a year. Most camcorders of a similar age and type to it support an SD compatible memory cards. This video camera also supports an SDHC compatible memory cards. 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 actually the best supported memory card type across all camcorders of this type and age.
Across similar types of camcorder the worst supported memory card type is SD.
SDHC cards are DS cards with a higher capacity of up to 32GB.