If you copy the location from the explorer properties, you won't get the file name, just the location. Don't forget to add the file name at the end.
Suggestion: Why don't you remove the path input again, but temporarily create an indicator at the path out. Run it again and browse to the path to make sure it works. Now right-click on the temporary indicator terminal and select "change to constant". Now wire this to the path input and it definitely should work.
Compare it charater by character with your own path constant to see where the problem is.