step by step, buy one of these1) data card reader
http://www.amazon.com/Bluetooth-Dong...p/B000BT8UB62) bluetooth dongle
http://www.amazon.com/Simple-Tech-BO...p/B000189W0A3) data cable
http://www.amazon.com/Eforcity-Nokia...dp/B000FFLYBY* insert your memory card into your phone* without a memory card you will need drivers for your pc to recognize your phone* Connect the cable from pc to phone* Open your "My Computer" icon in windows or open WIndows Explorer* go to the drive letter of the memory card. It should be something like F* locate your mp3 files that you wish to copy over, like in your My Documents folder* drag and drop the mp3 files to your memory card's My Sounds folder or something similarand thats iton that phone, you can't use those files as ringtones (i've owned a few sony's) because they need to be smaller than 300kb in size, , so you need a site to reduce the file size, , even though you dont want one. Go to "ventones" (dot com)1) upload any mp3 file2) reduce it to 30 seconds3) download itfollow my previous steps, load the smaller ringtones files, and you're set, enjoy life,