Share your experience!
Hi @Hafar, I'm sorry to hear about the troubles with moving your music to your SD card. 
Where are you downloading this music from? For example, is it music that you download as offline content from a streaming service?
Could you please try and move these music files manually using File Commander or another file manager? Are you then able to move the files that way to your SD card?
Let me know how it goes! 
Thanks for the update.
I'm afraid I wont be able to help you with a third party application.
Do you have any other music files on for example, a computer that you can transfer to the phone and see if you are able to move them to your SD card using the Settings > Storage & memory > Transfer data?
Keep me updated! 