The Canon Legria HF R68 supports a better memory card type than most small sensor size camcorders that have been on the market for more than a year. This Canon video camera supports an SDXC memory card, whereas most camcorders of a similar age and type to it support an SD memory card. In addition, this Canon camcorder supports an SDHC 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 actually the best supported memory card type amongst all camcorders of a similar age and type to the Legria HF R68.
The worst supported memory card type across similar types of camcorder is SD.
SDHC cards are DS cards with a higher capacity of up to 32GB.