Other than the app that constantly runs in the background on my desk top, the mobile app is the interface I interact with the most on DropBox. I am constantly moving files back and forth from my phone to DropBox's cloud storage. There have been dozen's of times I wanted to export the contents of an entire folder on DropBox to my phone, but had to do it one. file. at. a. time. Very annoying. There have also been times where I wanted to upload an entire folder's content from my phone to DropBox.