The file struct of DR3FanmadeViewer

Make sure you have already opened DR3FanmadeViewer at least once.

Then, if you use iOS, open "Files" app and find "DR3FanmadeViewer" folder; if you use Android, open User Home Folder (/storage/emulated/0/) and find "DR3Viewer" folder.(The picture only shows iOS)

Open this folder, and you'll see a file and a folder. "Songlist.json" is the list of songs, it will be read by DR3FanmadeViewer, and generate the song items in game. "songs" folder contains the song folders, unzip others' compressed file to it. Make sure every song files are in a independent folder, and each names of folders is their keyword.About the file struct in song folders, go to see the next chapter.