1. Crap does not say that more than Samsung mobile phone access applications are on the desktop click "Application."
2. Click "Set" again in the mobile interface.
3. Then you will see a "General" after we click on it and then click on the following "about the device".
4. Then click the "build number" seven times into the interface until the prompt "developer mode is enabled".
5. Click on the "<" icon to see "Developer Options".
6. OK now you will see that there is a "developer option" to go in, find "USB Debug" and click.
7. Click "OK" to open the "USB debugging" option.
Friendly Tips
Developer options only the Android system and this feature I think is generally set for developers, if you are not the developer set the best not to mess up, of course, if you want to use the mobile phone and computer connection and then use the phone assistant to help the mobile phone installation software, Backup data then this developer option must be turned on, or your phone will not be able to successfully connect with the computer.