You should be able to achieve this with the help of the Cordova FileTransfer plugin. You can check its upload features and a complete usage example, here
Also, note that the FileTransfer plugin is one of the AppBuilder's Core plugins
and as such, it can be directly enabled from your project's properties
. In other words, no additional configurations or set ups are needed in order to use it inside your application.
I hope this helps. Please, let us know if you will require further assistance.