The Panasonic HC-X909 supports a better memory card type than most camcorders of this age and spec. This camcorder 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. This video camera 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).
An SDXC compatible memory cards is actually the best supported memory card type across all similar spec video cameras that were released around the same time as the HC-X909.
A MicroSD (Transflash) compatible memory cards is the worst supported memory card type amongst comparable types of video camera.
SDHC cards are DS cards with a higher capacity of up to 32GB.