The Samsung Galaxy A7 smartphone runs on Android out of the box, but that version of Android that you get isn’t going to allow for any developing unless you get root access to the lower levels of the system. The person who is in control of the root user account is the person who gets to choose what is installed and uninstalled. Moreover, it gives the chance to install apps that were not available to be installed before. Many of those apps are powerful ones that can do extraordinary things like allow you to change the appearance, features, create a longer lasting battery, clock the CPU frequency differently for modifying the performance and so forth.
- You must have the Samsung Galaxy A7 smartphone that comes with the SM-A700FD model number to use this guide. Any other model number gets bricked when you use this guide.
- You need to have a computer that runs on the Windows operating system to use the flashing tool that you are using to flash the rooting file.
BEFORE WE BEGIN
- Chainfire had the MMB29M.A700FDXXU1CPH5 firmware build number running on the Samsung Galaxy A7 SM-A700FD smartphone when the version of the CF-Auto-Root tool that is found in this guide was developed. He does not suggest you need pot be running the same when you follow this guide and flash the rooting file. He gives it so you can use it as an indicator.
- You need to have the Developer Options menu unlocked  on the Samsung Galaxy A7 smartphone so you can enter it and then turn on the USB Debugging Mode  which then allows you to make the necessary changes to the Android software for the rooting of the operating system to work.
- Install the Samsung USB Drivers  on the computer before getting started with the guide so that Odin is then able to detect your smartphone after you connect it to the computer with the USB cable.
HOW TO ROOT SAMSUNG GALAXY A7 SM-A700FD RUNNING ON ANDROID 6.0.1 WITH CF-AUTO-ROOT
- Download the CF-Auto-Root  tool for the Samsung Galaxy A7 SM-A700FD smartphone running Android 6.0.1 Marshmallow.
- Extract the rooting file to the Downloads folder on the computer—or whatever folder you have set as the default downloads option—and you get the flashable version of the rooting file and the flashing tool (Odin).
- Run the Odin flashing tool application from the Downloads folder and the flashing tool user interface opens on the computer.
- Boot the Samsung Galaxy A7 SM-A700FD smartphone into the Download Mode  and connect it to the computer with the USB cable.
- Check Odin lights up the ID: COM port with a blue or yellow color so you know the Samsung USB Drivers are working.
- Click on the AP button and then browse to the Downloads folder and select the rooting file that is there since you extracted it earlier.
- Click on the Start button from Odin and the rooting of the Samsung Galaxy A7 begins.
- Wait until Odin shows a pass message from a green box in the corner of the user interface before unplugging from the computer.
In conclusion, that is how to root Samsung Galaxy A7 SM-A700FD smartphones running on the Android 6.0.1 Marshmallow software updates using the CF-Auto-Root tool developed by Chainfire. You now have the SuperSU available from the app drawer since that is what the CF-Auto-Root tool just installed and enabled for the smartphone. It is already working to help grant those rooting permissions over the operating system for you so the root apps can run. All you need to do is find them and install them. Most of the root apps are available from the Google Play Store while a few of the other popular ones are found by doing a Google search for the names.