The Legria HF R78 supports a better memory card type than most video cameras that came out around the same time as it. This video camera supports an SDXC memory card, whereas most newly released camcorders support 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 in fact the best supported memory card type across all small sensor size video cameras that are a comparable age to the Legria HF R78.
The worst supported memory card type amongst comparable types of camcorder is SD.
SDHC cards are DS cards with a higher capacity of up to 32GB.