iMobie PodTrans Pro for Windows is able to synchronize music, movies, playlists and the whole library between iPod & iTunes. It will convert any incompatible files to iPod friendly format silently during the transfer using its advanced trans-coding engine. It is easy to use and works together with USB 3.0 and Lightning interface to achieve up to 20MB/s transferring speed. The software supports anything from old iPods to the new iPod nano 7.
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iMobie PodTrans Pro for Windows costs 29.99 USD.