smartChord does make backups automatically on the external storage.
In the ‘Backup’ feature, you can create a backup anytime. There you can also restore any backup. The backups are stored in the smartChord/backup folder of your device storage. You can reach the ‘Backup’ feature by the menu on the ‘Home’ screen.
From there you can copy a backup file to the smartChord/backup folder of another device and restore in the ‘Backup’ feature.
You can use the ‘Share’ functionality in the ‘Backup’ feature to send a backup to a save place or to another device where you can restore it.
smartChord also detects backups after an new installation and asks if it should be restored.