Issue description:
Soon it will be possible to backup user data and synchronized music from Online Providers, this would be very good when Reinstalling Synfonium on another cell phone, just take the Backup file and restore it on the new cell phone with the music synchronized online from the provider, for example Google drive
Logs:
Upload description: backup of user data including synchronized music online and independent of provider
Additional information:
Reproduction steps:
backup of user data including synchronized music online and independent of provider
Media provider:
Local device
Screenshots: