The GY-LS300 supports an SDXC memory card which is better than the SDHC memory card supported by most big sensor size video cameras that are a comparable age to it. 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 a similar type and age to the GY-LS300.
Amongst comparable types of camcorder the worst supported memory card type is SD.
SDHC cards are DS cards with a higher capacity of up to 32GB.