Question: what are sdxc memory cards?
Answer: SD Extended Capacity (SDXC™) card is an SD™ memory card based on the SDA 3.0 specification. ... This is a design enhancement to increase the performance of SDHC/SDXC cards. UHS-I specification defines two bus architecture options for up to 50MB/s (UHS-50) and 104MB/s (UHS-104) data transfer rates.