File operations

There are the following six file operations.
* Open
* Write
* Delete files
* Open from storage
* Write to storage
* Write MIDI

Open a song from within the app.

Save songs within the app.

Delete files
Delete songs in the app.

Open from storage
Open a song from storage.
(If you open the song from a computer etc, you have to copy the song to the storage of your smartphone)

Write to storage
Save songs to storage.
(Used when saving songs on a computer etc.)

Write MIDI
Save a song as MIDI to storage
(You can copy MIDI to your computer or play MIDI with other apps)

To save to storage, please enable Easy Music Composer storage permission in settings of android.

If you can not see a file from your computer etc., scan the media or reset the smartphone.