The Vixia HF M40 supports a better memory card type than most small sensor size camcorders that were released more than two years ago. This camcorder supports an SDXC memory card, whereas most small sensor size camcorders that were released more than two years ago support an SD memory card. In addition, this 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 in fact the best supported memory card type amongst all comparable spec video cameras that are a similar age to the Vixia HF M40.
The worst supported memory card type amongst comparable types of video camera is MicroSD (Transflash).
SDHC cards are DS cards with a higher capacity of up to 32GB.