To hard reset the Samsung Galaxy J2 SM J200G, you can follow these steps:
1. Turn off your Samsung Galaxy J2 SM J200G by holding down the Power button and selecting "Power off" from the options.
2. Press and hold the Volume Up button, Home button, and Power button simultaneously. Keep holding them until you see the Samsung logo appear on the screen.
3. When the Samsung logo appears, release all the buttons. This will take you to the Recovery mode menu.
4. In the Recovery mode menu, use the Volume buttons to navigate and highlight the "Wipe data/factory reset" option.
5. Once the option is highlighted, press the Power button to select it.
6. You will be asked to confirm the action. Use the Volume buttons to navigate and highlight the "Yes" option, then press the Power button to confirm.
7. The device will now begin the factory reset process. Wait for it to complete.
8. Once the process is finished, you will see the option to reboot the device. Use the Volume buttons to highlight the "Reboot system now" option and press the Power button to restart your Samsung Galaxy J2 SM J200G.
Please note that performing a hard reset will erase all data on your device, including apps, settings, and personal files. It is important to back up any important data before proceeding with the hard reset.