About embbeding textures on fbx or any format

Hi!
I've been searching for hours about a way to export a model from blender with texture images embbeded.
(I'd say i did this some years ago, but don't remember very well...)
When I export from blender to Unity in fbx format (using the option Path -> Copy nad clicking the Embbed textures icon), i obtain a white model on Uity.
Some forums say that its possible to export Color Map, Normal Map and Occlusion Map inside the fbx file to Unity, but nothing works for me.
I can just save the texture images to files form blender and import them into my Unity Project, but i'd really like to have all inside the file for project organization (I don't want a lot of "texture" folders or a textures folder with 100 Normal Maps, 100 Ambien Occlusion Maps, etc... very hard to work with that).

Is there ANY way to import the textures with the fbx or some other format that can pack everything inside the file compatible with Unity?

 

Hi,
This is one of what Google found when searching for "blender export fbx with texture to unity":