The Sony HDR-CX730 supports an SDXC memory card which is better than the SD memory card supported by most camcorders of this spec and age. In addition, this Sony video camera support MS PRO Duo Mark 2 and MS Pro-HG Duo and SDHC 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 actually the best supported memory card type amongst all similar spec video cameras that are a comparable age to the HDR-CX730.
The worst supported memory card type amongst comparable types of video camera is MicroSDXC.
SDHC cards are DS cards with a higher capacity of up to 32GB.