The HC-W850 supports an SDXC memory card which is better than the SDHC memory card supported by most camcorders of this age and spec. This Sharp 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 on the market for around the same time as the HC-W850.
The worst supported memory card type amongst comparable types of camcorder is MS Pro-HG.
SDHC cards are DS cards with a higher capacity of up to 32GB.