In order to add music to Facebook story by uploading photos and videos with the music just follow these steps:

• Open the Facebook app in your smartphone and tap on ‘Create Story’.
• Choose a photo or video from gallery or click one from the story camera.
• Tap on ‘Sticker’ and then on ‘Music’ sticker.
• Search for the song you want to add with the picture or video.
• Tap on the ‘Lyrics’ option and adjust the bar as per the portion you want in the story.
• Finally tap on ‘Done’ and then on ‘Share to Story’.