How to access data/data folder in Android device?

adb shell
run-as com.your.packagename 
cp /data/data/com.your.pacakagename/

How to access data/data folder in Android device? - Stack Overflow:

http://blog.shvetsov.com/2013/02/access-android-app-data-without-root.html

https://www.nccgroup.trust/us/about-us/newsroom-and-events/blog/2011/april/pulling-and-finding-apks-without-root-on-android/