The Vixia HF R20 supports a better memory card type than most small sensor size camcorders that came out more than two years ago. This video camera supports an SDXC memory card, whereas most similar spec camcorders that were released more than two years ago support an SD memory card. This camcorder also 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 that have been around for a similar time to the Vixia HF R20.
The worst supported memory card type across comparable types of video camera is MicroSD (Transflash).
SDHC cards are DS cards with a higher capacity of up to 32GB.