If you didn’t enable USB debugging on your device before connecting to Syncios Data Transfer, you will be prompt to enable USB debugging mode to continue.
Enter Settings, this can be found in your App Drawer, or by pressing the menu button on the outside of your device.
Press About Phone < Tap Build number multiple times until getting a note You are under developer mode < Back to Settings < Click Developer options < Tick USB debugging
Enter Settings< Click Developer options < Tick USB debugging
Go to Settings < Press Applications < Tap Development < Check USB debugging
After USB debugging mode is enabled, Syncios Data Transfer can connect to your Android device. Important notice: Please do not forgot to anthorize this computer on your android phone screen like shown below.