NOTE: You can check this thread for a guide on how to back up app data, contacts, and media files

Restore App Data:

  1. Launch “Settings
  2. Go to “Phone Management
  3. Tap “Backup & Reset
  4. Tap “Restore from backup” and select the backup file you want to restore
  5. Tap “Start” > “Done

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

Restore Contacts:

  1. Launch “Settings” and go to “Phone Management
  2. Tap “Backup & Reset
  3. Under “LG Backup” select “Restore from backup
  4. Select the backup you want to restore and tap “Start
  5. When prompted with “Restored” tap “Done

Restore Media Files:

  1. Open “Settings
  2. Go to “Phone Management
  3. Tap “Backup & Reset” > “Restore from backup
  4. Select the media file backups you want to restore
  5. Tap “Start” and when prompted, tap “Restart” to complete the process

Restore Media Files from a PC:

  1. Connect the Android phone to the computer via USB
  2. On the phone, enable “File Transfer” / “Media device” when prompted or from the Notification area
  3. Navigate to the media file backups on the PC
  4. Copy and transfer the files to the phone storage, preferably in the folders from where they originate
  5. Once the transfer is done, eject the phone storage and safely disconnect the device from the USB port

See More: LG G7 ThinQ: Restore App Data, Contacts, and Media Files