You may find iTunes doesn't work or cannot transfer some specific files from time to time. If you want a solution to get rid of iTunes' synchronization, Leawo iTransfer is an excellent alternative to iTunes. (Although you have to have iTunes installed on your PC to use Leawo iTransfer.)
Leawo iTransfer can quickly and securely transfer files between iOS devices, iTunes, and PC. The transferring files can be apps, music, videos, messages, contacts, etc. Any files you want to move into the iOS devices, even the files that are not supported by iOS devices, can be transferred with Leawo iTransfer. Plus, it can be used as a music manager, allowing users to add or remove audio files to the playlist on iOS devices. The transferring process is easy and straightforward, only requires three steps: connect, select and transfer.