The HC-V550 supports an SDXC compatible memory cards which is better than most camcorders of this spec and age. Most small total megapixels video cameras that were released more than two years ago support an SD compatible memory cards. This video camera 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).
This camcorder's memory card type (SDXC) is in fact the best supported memory card type amongst all comparable spec video cameras that were launched around the same time as the HC-V550.
The worst supported memory card type amongst similar types of camcorder is MicroSD (Transflash).
SDHC cards are DS cards with a higher capacity of up to 32GB.