Blender to Substance

I m trying many to export low poly objects sharing the same uv(material) for batch baking with substance (painter or designer)
and i always get 1 mesh inside substance.

I found this but couldnt get the export settings right and instead i get 1 obj with many materials .
Any help is very appreciated

Nevermind found it!!! As long as the name pairing is correct (_high _low) substance finds the matches automagicaly.