create a backup
chose which backup file you want to restore or delete (because it’s no longer needed)
give Japanese LS access to Dropbox so it can store backups there. The app will not have general access to your dropbox data. There will be a folder created „Apps/japanesels“. This the only folder Japanese LS will have access to.
chose whether you want to store your backups on the devices SD-Card or on dropbox.