Android 4.4.2 Doesn't Have Permission To Write To This Folder. in Sync Troubleshooting Posted October 14, 2014 · Report reply Can Dropbox sync files at ANY location on an external SD card?(!)As far as I know dropbox cannot do this either. However, when dropbox has its repository on the internal storage it will only download files on demand keeping the required storage space to a minimum. For files required offline on the android device, dropbox has the option to mark files as favorites which stores the files locally. I would be happy with a similar setup in Sync but what I understand is that once a file is opened from sync on the local device, it will store the file locally from then on, is that correct. Is there any explenation/documentation where local storage policy with sync on android is explained?