The HDC-SD40 supports a better memory card type than most small total megapixels camcorders that are a similar age to it. This video camera supports an SDXC compatible memory cards, whereas most small total megapixels camcorders that were released around the same time as it support an SD compatible memory cards. This camcorder also 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 actually the best supported memory card type across all video cameras of this age and spec.
Across comparable 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.