The GY-LS300 supports an SDXC memory card which is better than most big sensor size video cameras that were released around the same time as it. Most video cameras that are a similar age to it support an SDHC 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).
This camcorder's memory card type (SDXC) is in fact the best supported memory card type across all similar spec video cameras that were launched around the same time as the GY-LS300.
The worst supported memory card type amongst comparable types of camcorder is SD.
SDHC cards are DS cards with a higher capacity of up to 32GB.