MusicBee supports sync to USB drives and MTP devices (Android).
Due to its proprietary software, Apple devices are not supported.


MTP devices will appear in the File menu


You can configure them in Preference > Devices


In Settings you can choose path, audio formats, etc.


How to sync - MusicBee Wikia

You can also use the WiFi to sync your phone.

In my case It is much faster than using the USB connection.