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

Restore Contacts from SD Storage:

  1. Open “Contacts
  2. Tap “Menu
  3. Go to “Settings
  4. If necessary, tap “Contacts to display” and select “All contacts
  5. Tap “Import/Export contacts” > “Import from SD card
  6. Press “OK

Restore Media Files from SD Storage:

  1. Open “My Files
  2. Go to “SD card” and tap “Menu” > “edit
  3. Tick the check boxes linked with the media files you want to restore
  4. Tap “Menu” > “Move” > “Internal storage
  5. Tap “Move here” or tap “Create folder” or the folder name to restore the files to a different location
  6. When ready, tap “Move here

Restore Media Files from a PC:

  1. Connect the Android device to the computer via USB
  2. On the phone, enable “Media device” / ‘File Transfer
  3. Launch the File Explorer on the computer
  4. Locate the media file backups on the PC
  5. Copy and paste the files to the phone storage, preferably in the folders from where they originate
  6. After the transfer completes you can safely disconnect the phone from the USB port

Restore Media Files from a Mac:

  1. Connect the Android device to the Mac via USB
  2. Enable “File Transfer” / “Media device” on the phone
  3. Open Kieson the Mac
  4. Access the “Back up / Restore” tap and go to “Restore
  5. Tick the boxes associated with “Music” “Photos” and other media file types you want to restore
  6. Click “Restore” and follow the on-screen prompts to complete the process
  7. Once done, drag the phone’s virtual drive from the desktop and drop it over the “Trash can” to eject it
  8. You can safely disconnect the device from the USB port

See More: Samsung Galaxy J7 Duos (2018): Restore Contacts and Media Files