If you wish to use certain apps or developer tools with your Samsung Galaxy Nexus, you will need to enable USB Debugging on the device. Here’s where to find the setting.
1. Open Settings.
2. Scroll down and select Developer options. If you do not see this option, you may have to enable it.
3. Check the USB debugging box.
4. Select OK to confirm your selection.
You have finished the steps for enabling USB debugging on the Samsung Galaxy Nexus. For security purposes, you may want to disable this setting when you are finished with development or app that requires this setting.