All imported media go straight into your pre-installed apps that are developed by Apple.
- If you transfer a video file, it will land into the pre-installed Videos app/Apple TV app.
- If you drop a song – it can be played back directly from the default Music app.
- If it is an EPUB or a PDF file – it will go straight to your iBooks app.
- As for ringtones, they all appear in Settings>Sounds>Ringtone.