transfer taking way too long

For the past 7 hours I've been trying to get my new iPad to finish transferring from my iPhone SE. I've contacted Apple support twice and was told it could take all night!

I'll need my phone tomorrow morning.....what happens if I just take my phone and interrupt the "Finish"..does it start all over again when I return and place the phone by the iPad?

This is too frustrating because I honestly don't have a tom of photos, have some music but not an overwhelming amount...anyone else having this issue?