I wiped my old phone and got a new one today, and on my old phone I had all of Google's back-up options turned on, but it didn't sync any of my app data when I installed the apps on my new phone.
Just in case something like this happened, I also copied and pasted the files of my old phone into a folder on my PC. However, nothing changed when I copied all those files onto my new phone. What am I doing wrong?