The GZ-RX610 supports a better memory card type than most big sensor size video cameras that are a similar age to it. This video camera supports an SDXC memory card, whereas most recently released big sensor size video cameras support an SD 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).
An SDXC memory card is in fact the best supported memory card type amongst all recently released big sensor size video cameras.
The worst supported memory card type across similar types of camcorder is SD.