NOTE: You can check this thread for instructions on how to back up app data, contacts, and media files on the phone.

Restore App Data:

  1. Open “Settings
  2. Access “Phone Management
  3. Tap “Backup & Reset” > “Restore from backup
  4. Select the desired backup file
  5. Tap “Start” > “Done

NOTE: You might need to reboot the device to complete the process

Restore Contacts:

  1. Launch “Settings
  2. Go to “Phone Management
  3. Tap ”Bakcup & Reset
  4. Select “Restore from backup” under “LG Backup
  5. Tap the desired backup file then tap “Start
  6. When prompted with “Restored” tap “Done

Restore Media Files:

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

Restore Media Files from a PC:

  1. Establish a USB connection between the phone and PC
  2. On the phone, enable “File Transfer” / ‘Media device” at the prompt or from the Notification area
  3. Open the File Explorer on the computer
  4. Navigate to the media backup files on the PC
  5. Copy and transfer the files to the phone storage, preferably in the folders of origin
  6. Once done, eject the phone storage and safely disconnect the phone from the USB cord

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