The HC-W850 supports an SDXC memory card which is better than most big sensor size video cameras that have been on the market for a similar time to it. Most video cameras that were released around the same time as it support an SDHC memory card. In addition, this Panasonic camcorder 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 in fact the best supported memory card type amongst all big sensor size video cameras that came out around the same time as the HC-W850.
Amongst similar 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.