I have connected via USB to my computer where the song has been downloaded. How do I copy it & get it on my phone?
Use this link to see how to copy the .mp3 from the computer to the phone. To use the .mp3 for music playback, place a copy in the Music folder of the device. To use the .mp3 as a Ringtone, place a copy in the device's Ringtone folder. Likewise, put a copy of the .mp3 in the device's Notification folder to use the .mp3 as a Notification sound.
http://www.verizonwireless.com/support/knowledge-base-97257/