Step 1: Download custom recovery (TWRP) from the all files and mods section
Step 2: Run Odin (as administrator) on your PC and click AP and choose the twrp file you downloaded in step 1.
Step 3: Put your phone in download mode (hold volume down + power + home button for several seconds) and connect to PC
Step 4: Click start, and your phone will reboot once down. Now you have a custom recovery that you can access by first powering off the device, and then holding volume up + power + home buttons.
Enjoy!!
