Short test of file writes from PhoneGap file core plugin on Samsung Galaxy7.
This file writing source code is adapted as directly as possible from the sample code link in the PhoneGap core file plugin docs at apache/cordova-plugin-file .
The sample code is from HTML5 Rocks: http://www.html5rocks.com/en/tutorials/file/filesystem/
Run the app and click the "Write File" button to save a text file to the "AndFileTest" folder in the default PERSISTENT file directory.
If the write succeeds or generates an error that Javascript can handle, the program will show an Alert dialog box saying what happened. If there is no dialog box at all, then probably the file write routines triggered a crash within the Cordova plugin. A stack trace should be available in the console log in this case.