Save UI real estate and clicks by using only one [import] button
The import dialogue could then allow radio buttons to select one or multiple files/folders from a file selector or import from a compatible device -
Scanning for a compatible device could then be triggered when the [Import] button is pressed, so the dialogue can display the option of importing from it or grey that option out with a small text that no compatible device was found.
This one button could then even move into the header...
This would save screen real estate, clicks and everything would be in one place.