The Panasonic HC-X920 supports an SDXC memory card which is better than most comparable spec camcorders that came out around the same time as it. Most video cameras that have been around for a similar time 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).
This video camera's memory card type (SDXC) is actually the best supported memory card type amongst all camcorders of a comparable age and spec to the HC-X920.
An MS Pro-HG 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.