I used double twist....theres also isync......and a few others...you install the app on the phone,and go on the website on the pc,download the proper drivers,and hook it up,it will convert your music from itunes, to double twist or whatever else....Ive found that once double twist converts them,my windows media player will usually pick them up automatically and import them....you can then put the music you want into a sync folder and sync that folder with the sd card in your droid phone....