The Panasonic HDC-SD90 supports an SDXC memory card which is better than most medium sensor size camcorders that have been around for more than two years. Most similar spec camcorders that came out around the same time as it support an SDHC memory card. In addition, this video camera supports an 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 video cameras of this type and age.
A MicroSDXC memory card is the worst supported memory card type across similar types of camcorder.
SDHC cards are DS cards with a higher capacity of up to 32GB.