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

Restore Contacts from SD Storage:

  1. Open “Contacts
  2. Tap “Menu” > “Settings
  3. Tap “Contacts to display” and select “All contacts
  4. Tap “Import/Export contacts” > “Import from SD card
  5. Tap “OK” to confirm

Restore Media Files from SD Storage:

  1. Launch “My Files
  2. Go to “SD Card
  3. Tap “Menu” > “Edit
  4. Tick the boxes associated with the media files you want to restore
  5. Tap “Menu” > “Move
  6. Tap “Internal storage” > “Move here” > “Create folder
  7. Select the desired folder
  8. Tap “Move here

Restore Media Files from a Windows PC:

  1. Connect the Android phone to the PC via USB
  2. Enable “Media device” / “File Transfer” on the phone when prompted or from the Notification area
  3. Launch the File Explorer on the computer
  4. Copy and paste the files to the phone storage, preferably in the folders of origin
  5. once the transfer completes, eject the phone storage and safely disconnect the device from the USB port

See More: Samsung Galaxy A8s: Restore Contacts and Media