The Sony HDR-CX210 supports a better memory card type than most medium sensor size camcorders that are a similar age to it. This video camera supports an SDXC memory card, whereas most medium sensor size camcorders that have been on the market for around the same time as it support an SDHC memory card. This camcorder also support an MS PRO Duo and 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).
An SDXC memory card is in fact the best supported memory card type amongst all similar spec camcorders that have been available for a comparable time to the HDR-CX210.
The worst supported memory card type amongst similar types of camcorder is MicroSDXC.
SDHC cards are DS cards with a higher capacity of up to 32GB.