Write an article based on this "Back up and save all personal data on your Galaxy S3 using Samsung Kies, Google, your computer, or a third-party cloud storage service. Connect your Samsung Galaxy S3 to your Windows-based computer using a USB cable. Wait for your computer to automatically install the latest device drivers from Samsung. Navigate to the XDA Developer’s website at http://forum.xda-developers.com/attachment.php?attachmentid=1110471&d=1338981159, and select the option to save the Odin .zip file to your desktop. Double-click on the .zip file to extract its contents, then launch the Odin .exe file. Follow the on-screen prompts to install Odin on your computer. Navigate to the Chainfire website at https://download.chainfire.eu/194/CF-Root/SGS3/CF-Root-SGS3-v6.3.zip, and select the option to download the CF-Root .zip file. Double-click on the CF-Root .zip file to extract its contents. Disconnect your Galaxy S3 from your computer and power off the device. Press and hold the Volume Down, Power, and Home buttons at the same time. Use the volume keys on your device to highlight “Download,” then press the Power key to make your selection. Open the Odin application, then click on “PDA. Select the .tar file you extracted earlier from the CF-Root zip folder. Verify that no checkmark exists next to “Re-partition,” then click on “Start. Disconnect the Galaxy S3 from your computer when the “pass” message displays in Odin. Restart your Galaxy S3."
This will help prevent data loss in the event complications arise during the rooting process. If you lack access to a Windows-based computer, root your device using Towelroot as outlined in Method Three of this article. If your computer fails to install updated drivers, navigate to Samsung’s Download Center at http://www.samsung.com/us/support/downloads, and select the option to install the latest drivers for your device.  This will open the Odin installer wizard. When complete, the Odin application icon will display on your desktop. This file contains the rooting software needed to root your Samsung Galaxy S3 using Odin. This will produce the .tar file required to root your device.  Your Galaxy S3 will power itself back on and display the recovery mode screen. This will boot your phone into download mode. ” The application will ask you to select a file.  ” Odin will begin rooting your device, which may take several minutes to complete.  Your device will now be rooted, and SuperSU will display in the app tray.