Best free way to sync itunes to my VZW HTC One?

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http://forums.androidcentral.com – I have about 120GB of music in my iTunes, needless to say they cannot all fit on my phone. But I have made playlists of music I like and used to keep on my BB. I tried the HTC sync manager. First it took 3 hours to load all the music, because it kept restarting every 3000 songs or so. Then when I sync, it will only sync the playlists, not the songs on there. And then I tried DoubleTwist, which also does not work, because the VZW HTC One cannot be used as a Mass Storage Device, and therefore cannot load music onto it. I don't want to pay the $4.99 for the wireless DoubleTwist sync if possible. (HowTos)