For the FP-30X, you can use a commercially available USB flash drive with a capacity of up to 32 GB that have been formatted on a computer (FAT32/MS-DOS(FAT)) or on the piano itself (see "Formatting a USB Flash Drive" in the FP-30X Owner's Manual).
For the FP-30X, you can use a commercially available USB flash drive with a capacity of up to 32 GB that have been formatted on a computer (FAT32/MS-DOS(FAT)) or on the piano itself (see "Formatting a USB Flash Drive" in the FP-30X Owner's Manual).