Samsung Galaxy S7 User Manual page 214

Before resetting your device:
1. Verify that the information you want to keep has transferred to
your storage area.
2. Log in to your Google Account and confirm your user name and
password.
To reset your device:
1. From a Home screen, tap
2. Tap Backup and reset > Factory data reset.
3. Tap Reset device and follow the prompts to perform the reset.
4. When the device restarts, follow the prompts to set up your
device.
Settings
Apps > Settings.
203 Backup and Reset