How do i add my fb without overwriting?

[Miu]

It says it wouls reset my local save if i login but i want to keep that and i don't have any save on fb, how do i link it without resetting?

[golemu]

I would like to know how to do this as well. I'm in the middle of season 16 on my phone and would rather not have to start from the beginning..

[MoeNinjaGirls]

Hello! Is your original account on your mobile phone linked to Facebook? If it's not, then you have to link that before you can transfer your progress. You can do so via the facebook link storage option in the game that can be accessed through help & settings! :)