This situation might happen if you have ‘Automatic Sync’ enabled inside iTunes/Finder. The truth is – iTunes overrides all ’foreign’ content (created or transferred by third-party apps like WALTR) from your device. There’s a simple workaround to fix this:

  1. Please connect your device to your computer.
  2. Open up iTunes > Device Summary > Options.
  3. Make sure that Automatic Sync is turned off for your device. [See screenshot below]