You want to transfer music, apps, and files in between your iDevices. iTunes app is not an ideal software for that purposes.
AnyTrans (USD$39.99) by iMobie is an all-in-one iPhone, iPod, and iPad transfer software allows you to share media content for all iDevices, as well as copy to iTunes and computer. No more iTunes syncing annoyance.Specially for this holiday season, iMobie generously sponsored 10x copies of AnyTrans licenses to LiewCF Tech Blog’s readers.
Here are the FREE AnyTrans license codes:
Update 12/31: Invalid license codes have been replaced.