The Vixia HF R40 supports an SDXC compatible memory cards which is better than the SD compatible memory cards supported by most camcorders that have been around for more than two years. This Canon camcorder also supports an SDHC compatible memory cards. SDXC cards are SD cards but with a much higher capacity and faster processing speeds. They have a maximum capacity of 2TB (Terabytes).
This video camera's memory card type (SDXC) is in fact the best supported memory card type across all camcorders of this age and spec.
Across similar types of video camera the worst supported memory card type is MicroSD (Transflash).
SDHC cards are DS cards with a higher capacity of up to 32GB.