Sometimes the drivers for the connection process get messed up. Download Mode will reset the connection between your device and your computer. You'll need the USB drivers from Samsung in order for this to work. You can download the USB drivers from Samsung's S3 Support page. Click the "USB (ENGLISH)" button and run the installer after downloading it. Press and hold the Power button and select "Power Off." Wait until your phone shuts down before proceeding. Your phone will need to be disconnected from your computer before proceeding. Start by holding the Home button, then press and hold the Volume Down button. While holding both buttons down, press and hold the Power button. You'll know you did it right when a warning screen with a yellow "!" sign appears. This will start your S3 in Download Mode. Windows should automatically detect it and install the necessary files. Windows should only take a few moments to install. Check the System Tray to see if the installation is complete. Hold both buttons for about ten seconds to reboot your phone normally. If you can't get your S3 to exit Download Mode, take the battery out and then reinsert it. After your phone boots up normally, try connecting it to your computer again. It will usually show up properly after booting into Download Mode.
نزّل تعريفات "يو إس بي" الخاصة بأجهزة سامسونج وثبتها على الجهاز. أغلق هاتف سامسونج جلاكسي إس 3 تمامًا وافصله من جهاز الكمبيوتر. اضغط باستمرار على الزر الرئيسي مع زر خفض الصوت وزر التشغيل. اضغط على زر رفع الصوت لتفعيل وضع التنزيل عندما يُطلب منك ذلك. وصّل الهاتف بجهاز الكمبيوتر. افصل هاتف سامسونج جلاكسي إس 3 بعد انتهاء تحميل التعريفات. اضغط باستمرار على الزر الرئيسي وزر التشغيل معًا. جرّب توصيل هاتف سامسونج جلاكسي إس 3 بجهاز الكمبيوتر مجددًا.