The Vixia HF M40 supports a better memory card type than most video cameras of this type and age. This video camera supports an SDXC compatible memory cards, whereas most similar spec video cameras that have been around for around the same time as it support an SD compatible memory cards. In addition, this Canon video camera 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).
An SDXC compatible memory cards is actually the best supported memory card type amongst all camcorders of a similar age and type to the Vixia HF M40.
A MicroSD (Transflash) compatible memory cards is the worst supported memory card type across similar types of video camera.
SDHC cards are DS cards with a higher capacity of up to 32GB.