The Sony HDR-CX290/B supports a better memory card type than most comparable spec camcorders that were released around the same time as it. This Sony video camera supports an SDXC compatible memory cards, whereas most video cameras that have been available for around the same time as it support an SDHC compatible memory cards. In addition, this Sony camcorder support a Memory Stick (MS) and SD 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).
This video camera's memory card type (SDXC) is in fact the best supported memory card type across all camcorders of this age and spec.
A MicroSD (Transflash) compatible memory cards is the worst supported memory card type across similar types of video camera.
SDHC cards are DS cards with a higher capacity of up to 32GB.