The HC-W570 supports a better memory card type than most small sensor size camcorders that have been available for around the same time as it. This Panasonic video camera supports an SDXC memory card, whereas most comparable spec video cameras that are a similar age to it support an SD memory card. In addition, this video camera 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 across all camcorders of a similar type and age to the HC-W570.
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.