SD cards are categorized by their storage capacity and the file system they use: Up to 2GB. SDHC (High Capacity): 2GB to 32GB (FAT32 file system).
2TB up to 128TB (future standard; first 4TB cards announced in 2024). 2. Decoding Speed Classes sd card
32GB to 2TB (exFAT file system by default). SD cards are categorized by their storage capacity