new iTunes - make sure nothing will be deleted
I have an iPhone with plenty of data... and there is a new iTunes on a new computer. Of course this new iTunes doesn't have any backup and has no library.
What should I (should not) do to achieve what I want?
What I want: make the phone copy everything to the new iTunes.
What I do not want: iTunes to delete everything on the phone, because it thinks I want to syncronise it, so that what there is in iTunes will be copied in the iPhone = nothing.