How to put music on the Motorola Rizr z3?

I'm so lost... I have the usb cord plugged in and in the phone and I don't know which file I'm supposed to do and the Phone is just acting normal so...I mean what am I supposed to do I want to put my own MP3 from my computer on it but I don't know where to start which Removable Disk would it be and stuff. Please Help!!!!

If you have an Mini SD card and the adapter you just put it into you memory card reader on your computer then open "My Computer" and open whatever folder your music is in and drag and drop you music. Also if you have a USB cable for your phone you can do it that way.
Hope this helped.