In order to sync music to Mighty, you must connect either an Amazon Music Unlimited or Amazon Prime Music account. You will not be able to sync any music without one of those subscriptions. Click here [link: https://amazon.com/music] to try Amazon Music Unlimited or Amazon Prime Music for free.
If you have an Amazon Music Unlimited or Amazon Prime Music and you still can't sync your music, try disconnecting and reconnecting your Amazon account. If that doesn't resolve the issue, please email us at email@example.com and we'll respond within one business day to help you troubleshoot.