My S4 is definitely not rooted. I'm fine so far without root. I've confirmed this using root checker. What I (ultimately) want to do is, sync my photos & raw files between a folder in my PC with my device, and using RawDroid to rate & tag these photos. Based on KitKat's limitation, this is impossible since both BTSync & RawDroid can only write in their own 'allowed' folders on the ExtSD. However, what I can do is transfer these .CR2, .JPG & .XMP files (and folders) between BTSync & RawDroid 'allowed' folders using ES File Explorer. How is that possible since ES is also subject for the same limitations?