The Panasonic HC-WX970 supports an SDXC memory card which is better than most video cameras of this age and spec. Most big sensor size video cameras that were launched around the same time as it support 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 similar spec video cameras that came out around the same time as the HC-WX970.
Across similar types of video camera the worst supported memory card type is SD.
SDHC cards are DS cards with a higher capacity of up to 32GB.