NOTE: You can visit this thread for a guide on how to back up data on the phone.

Restore App Data:

  1. Launch “Settings” and go to “Phone Management
  2. Tap “Backup & Reset
  3. Tap “Restore from backup” and select the desired backup file
  4. Tap “Start” > “Done

NOTE: You might need to reboot the phone to complete the process.

Restore Contacts:

  1. Open “Settings
  2. Access “Phone Management
  3. Tap “Backup & Reset
  4. Under “LG Backup” tap “Restore from backup
  5. Select the desired backup file
  6. Tap “Start” and at the “Restored” prompt, tap “Done

Restore Media Files:

  1. Launch “Settings
  2. Go to “Phone Management” > “Backup & Reset
  3. Tap “Restore from backup
  4. Select the desired media files and tap “Start” > “Restart

Restore Media Files from a PC:

  1. Connect the Android phone to the PC via USB
  2. On the phone, enable “Media device” / “File Transfer” at the prompt or from the Notification area
  3. Launch the File Explorer on the computer
  4. Locate the media backup files on the PC
  5. Copy and transfer the files to the phone storage in the folders of origin
  6. Once done, eject the phone storage and safely disconnect the phone from the USB port

See More: LG Stylo 4 Plus: Restore App Data, Contacts, and Media