It oughta be easy to sync a folder between an Android phone and... anything else.
I'm getting really frustrated with trying to find whatever clever little hack might let this happen, though. Apparently there's some value in locking everything down do that no Android app can actually work with an external SD card. What is their obsession with making it literally impossible to do this most essential task?
All I want to do is mirror a folder from my computer to my phone on command.