Jelly Bean :: Resetting Default SMS Ringtone On Note 3

I was in the default SMS ringtone settings as I wanted to separate SMS notification tone from the tone used for the other notifications and I accidently it to 'Facebook Pop' tone. Now I don't get the Samsung default 'whistle' tone on my Note 3 that I want and I don't know how to change it back. When I select the 'select ringtone' option just takes me to a memory folder paths and there is no sign of any of the default ringtones anywhere. I just want the factory ringtone back. Why does Google have to complicate things by taking you to the general folder paths just to select a ringtone? How to remove the Facebook Pop tone and get me back to the default whistle tone that I have selected in the system sound settings? There seems to be no way of accessing the device folders which appears in ES Explorer, there are only the external and internal memory folders available, making it impossible to access the default tone directly unless I copy it from the system folder via ES Explorer and paste it to a folder within the internal memory. Why can't Google allow direct access to default tones within the default SMS app in the ringtone selection pane? It seems like an obvious thing to do which the stupidly left out of even the latest OS. I'm running 4.3 Android.

P.S. it seems now that even in the system settings itself in the sound settings the default notification setting takes me to the same folder path rather than before where I could simply select from a small number of preinstalled notification tones. The call ringtones are unaffected and can simply select a ringtone without being taken to any stupid folder paths, but the notification setting is whacked because I dabbled with the SMS app settings. How stupid are the Google Android time, why can they do it as well as Apple?