The Legria HF G25 supports an SDXC memory card which is better than the SD memory card supported by most small sensor size camcorders that were launched around the same time as it. In addition, this Canon video camera 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 across all small sensor size camcorders that were launched around the same time as the Legria HF G25.
The worst supported memory card type amongst similar types of camcorder is MicroSD (Transflash).
SDHC cards are DS cards with a higher capacity of up to 32GB.