Zedong Zhou is correct, the DataSave plugin can not handle binary data at this stage. When we did develop the DataSave plugin we didn’t foresee the needs to use it in the way you describe. But it shouldn’t be hard to add that functionality to the plugin, seeing that there is some need for it.
IlijaTheSerb , please Hang around and I will look to see if we can make a new version that has the functionality you ask for! :)
FYI: the DataSave plugin now supports saving binary files! Open the settings dialog and look for the new settings, it’s quite self explanatory. Also visit the documentation page for more info. You’ll find the page here: DataSave documentation