Where can I find SharedPRefs file on my MotoG device ? It is with KitKat BTW
This is because your phone is not rooted. By default, only the application itself can access files in /data/data/com.whatever, so that casual users don't edit the files and break the app. To see these files, you need to root the device and use a file explorer tool that can use root (this is usually called a "root explorer" app or feature).