Samsung Galaxy Tab 10.1: A Second-Gen Android Tablet

[SystemDevelope1]

To debug applications on our android samsung galaxy S4, we must take steps like these:

1 - Select Apps
2 - Go to Settings
3 - Select More -> About Device
4-7 times on Tap Build Number
5 - Select More -> Developer options
6 - Check USB debugging
7 - Select OK to allow USB debugging
8 - Check USB debugging

They may find more information at the following link
http://www.systemdeveloper.info/2013/12/enablement-usb-debugging-in-samsung.html