Ionic 2 Native File cannot copy

Hello. I have a problem with native File plugin in my ionic 2 project. I use FileChooser to choose file and then resolve native path with FilePath plugin. I want to copy file to my app sandbox but there is always error in Promise resolving (no info about that, I tried to get some error log but I failed). I have problem with arguments in File.copyFile() method. How can I call this method using my full NativeURL to image and path to destination? I’m sure that both url and path are valid.