The Legria HF R406 supports an SDXC compatible memory cards which is better than most video cameras of this spec and age. Most small total megapixels video cameras that are a similar age to it support an SD compatible memory cards. In addition, this video camera supports an SDHC compatible memory cards. 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 compatible memory cards is in fact the best supported memory card type across all small total megapixels video cameras that have been around for a similar time to the Legria HF R406.
The worst supported memory card type across similar types of camcorder is MicroSD (Transflash).
SDHC cards are DS cards with a higher capacity of up to 32GB.