If you'd rather use a file explorer app to manage these files, you'll find the audio recordings stored in the root directory of your SD card or internal storage. (android.gadgethacks.com)
* You can create a new folder using the File Manager and put there all images you want to rotate on the Start / Lock screen. (windowsphonearea.com)
Do not use the files in this post if your device has any other modifications. (android.gs)