The Vixia HF R50 supports an SDXC memory card which is better than the SD memory card supported by most video cameras of this spec and age. This Canon camcorder also supports 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).
An SDXC memory card is in fact the best supported memory card type amongst all small sensor size camcorders that are a comparable age to the Vixia HF R50.
A MicroSD (Transflash) memory card is the worst supported memory card type amongst similar types of camcorder.
SDHC cards are DS cards with a higher capacity of up to 32GB.