Making iPhone/iPad the master when syncing with iTunes I am syncing my iPhone with my Mac using iTunes. How do I make the iPhone have priority over the Mac? I mean, I want to copy what is on the iPhone to iTunes, deleting from iTunes what is not anymore on the iPhone.

I hate when I clean my phone, do a sync, just to have iTunes copy everything back, because iTunes database regarding to that phone is not the same.

iTunes gives what is on iTunes a priority and I want the reverse.

thanks.
Essentially - you don't.

iTunes is the master, the iDevice is the slave. That's the way the system is designed.

It works on the assumption that you will always have plenty of room on your Mac to store data that there is no room for on the phone, so you can add it back to the phone at any time in future.  

I suppose it's legacy behaviour from before iCloud existed.