Sync music folders between phone and tablet I want to use a DJ returnable app on both devices, send want a fast way (WiFi) to keep the music folders sync'd. I always buy from my phone so just need to transfer existing music and new downloads from the phone to the tablet, it doesn't need to sync automatically but I do need a way to do easy multiple/bulk file transfers. 

What is a good way to do this? Wifi preferably but bluetooth if I have to.
DoubleTwist with AirSync will do this, as long as they're connected to the same WiFi network and looking at the same location.

For bulk file transfers, most file explorers (like ES File Explorer) allow you to browse devices from other devices on the same network.