The Panasonic HS900 supports an SDXC memory card which is better than the SDHC memory card supported by most medium sensor size camcorders that have been around for a comparable time to it. This Panasonic camcorder 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 across all video cameras of this age and spec.
The worst supported memory card type amongst comparable types of video camera is MicroSDXC.
SDHC cards are DS cards with a higher capacity of up to 32GB.