SCT Class 10 UHS-1 128GB SD XC Flash Memory Card, S.F128.RT - Retail Packaging Secure - built-in write-protect switch prevents accidental data loss High Quality SDXC card backed by 1 year limited warranty Ultra High Speed UHS-1 Class 10 File Format - FAT32 (SDHC 4GB-32GB) ExFAT (SDXC 64GB-128GB) Compatible - with SDXC host devices, SDXC cards are not compatible with standard SD nor SDHC-enabled devices/readers