First of all, connect your iPhone to PC then run iTunes.

1. Select the device(iPhone).

2. Click the menu ‘Apps’, then scroll-down.

3. Select the ‘Replayer’.

4. Drag & drop files to Replayer’s Documents Area(4).

5. Click the ‘Reload’ button on Replayer app(iPhone).

Then  you will see the file lists just you moved. Something like below.

That’s it !

Replayer Help : Features