If you are using Samsung Galaxy S5 android phone and want to connect your android smartphone with PC or MAC machine using USB cable to transfer files or any other reason. Enable USB Debugging Mode on your galaxy s5 android device. You will also need to enable USB debugging when you want to use Odin with android mobile device. Without using Odin, you won’t be able to install new ROM updates, if the OTA (over-the-air) updates are not available. USB Debugging option is not immediately visible in the Android settings, because this option is hidden in the developer options.