The Panasonic HC-X920 supports an SDXC memory card which is better than most camcorders of a similar type and age to it. Most camcorders of a similar age and type to it support an SDHC memory card. This video camera also supports an SD 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 amongst all big sensor size video cameras that have been around for a comparable time to the HC-X920.
Amongst comparable types of video camera the worst supported memory card type is MicroSD (Transflash).
SDHC cards are DS cards with a higher capacity of up to 32GB.