How to store data files permanently and locally only with iOS 5+ and Cordova 3.5?

I would like to store some data files in a quite permanent location, which should not be synchronized with iCloud.

Following Cordova documentation, cordova.file.cacheDirectory is my best option:

cordova.file.cacheDirectory - Directory for cached data files or any files that your app can re-create easily. The OS may delete these files when the device runs low on storage, nevertheless, apps should not rely on the OS to delete files in here

In order to control if I reach my goal, I check the size of data synchronized by iCloud:

Install and launch your app

Go to Settings > iCloud > Storage & Backup > Manage Storage

If necessary, tap "Show all apps" Check your app's storage

Well, my app is always so heavy...

Here is what I did so far :

Cloud entitlement is turned off in Xcode

config.xml

<preference name="BackupWebStorage" value="none" />
<preference name="iosPersistentFileLocation" value="Library" />

Javascript

function onDeviceReady(){
    window.requestFileSystem = window.requestFileSystem || window.webkitRequestFileSystem ;
    window.requestFileSYstem(LocalFileSystem.PERSISTENT, 0, gotFS, function(){
       console.log('Error FS');         
    });
}

function gotFS(fileSystem){
    window.cacheFS = fileSystem.cacheDirectory;
}

document.addEventListener('deviceReady', onDeviceReady, false);

and then, I use cacheFS.toURL() as a base directory to store the files.

Can you see what I missed?

Apple says that data that should not be synchronized should have a "do not backup" attribute, NSURLIsExcludedFromBackupKey attribute for NSURL objects, kCFURLIsExcludedFromBackupKey attribute for CFURLRef objects. I don't know what those objects are, and how to apply attributes with Cordova...

Solution

Indeed, I discovered a NoCloud folder created at the root of the app document directory. All data stored in this folder is not uploaded to iCloud.