For the HP704 and HP702, you can use a commercially available USB flash drive with a capacity of up to 32 GB that has been formatted on a computer (FAT32/MS-DOS(FAT)) or on the piano itself ([] > Format Media > USB Memory).
For the HP704 and HP702, you can use a commercially available USB flash drive with a capacity of up to 32 GB that has been formatted on a computer (FAT32/MS-DOS(FAT)) or on the piano itself ([] > Format Media > USB Memory).