Back Up App Data:

  1. Open “Settings
  2. Go to “Cloud and account
  3. Tap “Backup & Restore
  4. Enable “Back up my data” to back up app data, settings, and Wi-Fi passwords to your backup account
  5. Enable “Automatic Restore” to allow app data, settings, and Wi-Fi passwords to be restored automatically when signing in with the backup account or reinstalling apps

Back Up Contacts:

  1. Launch “Contacts
  2. Go to “Cloud and account
  3. Tap “Accounts
  4. Select the desired backup account
  5. Enable “Contacts” and tap “Menu” > “Sync Now

Back Up Contacts to SD Storage:

  1. Open “Contacts
  2. Tap “Menu
  3. Go to “Settings” and switch to “All contacts
  4. Access “Import/Export
  5. Tap “Export to SD” > “OK

Back Up Media Files to Phone Storage:

  1. Launch “My Files
  2. Go to “Internal storage
  3. Tap “Menu
  4. Tap “Share” and select the desired contacts
  5. Tap “Share” again and select the desired backup location

Back Up Media Files on a Windows PC:

  1. Connect the Android phone to the PC via USB
  2. Enable “Media device” / “File Transfer” when prompted or from the Notification area
  3. Launch the File Explorer on the computer
  4. Locate the media files on the phone
  5. Copy and transfer the files to the desired location on the PC
  6. Once done, eject the phone storage and safely disconnect the device from the USB port

See More: Samsung Galaxy J2 Core: Back Up App Data, Contacts, and Media Files