First insert ur pen drive in casio ctx keyboard click function search media and format it and put this.file in media file in pen drive again insert to keyboard click function>media >load>style and use this files
https://youtu.be/DEtBrtGvezg
I created this video using copy and paste hidden function it will be usefull to create intro, ending, and all the variations 1, 2, 3, 4 with fill in