Background Transfer is primarily designed for long-term transfer operations for resources like video, music, and large images. For a high-level look at Background Transfer, see Transferring data in the background. XHR is recommended for short-term operations involving transfers of smaller resources (i.e. a couple KB).
This topic will show you how to download a file.
This topic will show you how to upload data or a file from a device to the Internet.
Build date: 11/29/2012