The Panasonic HX-WA3 supports an SDXC memory card which is better than most camcorders that have been around for a similar time to it. Most camcorders of a similar spec and age to 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 big sensor size camcorders that have been around for around the same time as the HX-WA3.
An MS Pro-HG Duo memory card is the worst supported memory card type across comparable types of video camera.
SDHC cards are DS cards with a higher capacity of up to 32GB.