The Canon XA30 supports an SDXC memory card which is better than the SD memory card supported by most comparable spec video cameras that have been available for a similar time to it. SDXC cards are SD cards but with a much higher capacity and faster processing speeds. They have a maximum capacity of 2TB (Terabytes).
This camcorder's memory card type (SDXC) is actually the best supported memory card type across all camcorders of a similar age and spec to the XA30.
An SD memory card is the worst supported memory card type amongst comparable types of camcorder.
SDHC cards are DS cards with a higher capacity of up to 32GB.