<preference name="AndroidPersistentFileLocation" value="Compatibility" /> <preference name="AndroidExtraFilesystems" value="sdcard,cache" /> code example

Example: cordova js how to load local file in subdir

var path = window.location.href.replace('index.html', '');
var jsonFile = path + "menus/" + menuc + ".json";
$.getJSON(jsonFile, function(result) {
    sortAllergies(result);
});