The Legria FS406 supports an SDXC memory card which is better than the SD memory card supported by most video cameras of this spec and age. 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 in fact the best supported memory card type across all small sensor size camcorders that have been on the market for a similar time to the Legria FS406.
The worst supported memory card type across comparable types of video camera is MicroSD (Transflash).
SDHC cards are DS cards with a higher capacity of up to 32GB.