These are the instructions to root Samsung Galaxy A3 SM-A300FU (running on android 4.4.4, built id KTU84P.A300FUXXU1ANL4) using Rooting tool on Windows Computer.
Requirements: Your Samsung Galaxy A3 SM-A300FU should have atleast 30-40 percent of battery to perform the rooting process.
Root Samsung Galaxy A3 SM-A300FU
(Link are Updated Daily and if one Link is Down try another link to Root your Device)
Step 1: Download Rooting tool ( software tool) on your computer ->
LINK 1
LINK 2
Step 2: install the downloaded software tool
Step 3: Now Download and Install Samsung USB Driver on your computer.
Step 4:Also Download and extract the root files on your computer. After extracting you will be able to see the root files:
Step 5: Now, Switch off your Smartphone.
Step 6: After switching-off the phone, you need to boot into Download Mode. To boot into download mode Press and hold Volume Down, Home and Power button at same time for 5-8 seconds until download mode is active.
Step 7: In the Download mode you will be able to see a Warning Yellow Triangle Sign. In this situation you have to press the Volume Up key to continue.
Step 8: Now, Open Software tool that you have downloaded in the Step#1) on your computer. Then connect your Smartphone to the computer.
Step 9: Once you have connected the Smartphone to the computer, rooting tool will automatically recognize the device and show “Added” message at the lower-left panel.
Step 10: Once your device is detected by Odin, click on the PDA button and select the CF-Auto-Root.tar file (you have downloaded this file in step#4).
Step 11: Now, click on the Start button in root tool to begin the Flashing.
Step 12: Flashing usually takes 30-50 seconds to complete the rooting process on your Samsung Galaxy A3 SM-A300FU. Once Rooting process is completed you will be able to see a Green Box with Pass written on it. During this process Smartphone will re-boot automatically.
Step 13: Once you see, the Pass message, you can disconnect your Device from the computer.
Step 14: Now, to make sure you have successfully rooted your Samsung Galaxy A3 SM-A300FU, open Applications Menu on your Smartphone and Find SuperSU App. If this app exist on your Smartphone then it means you have successfully rooted your device. Congratulations.