 So you finish your textures and you want to get them out of Substance Painter, not a problem. Once you've got everything done, just go to File, Export Textures, specify which textures you want to show up. For example, I don't really need height maps because we have normal maps. Pick the file that you want to export everything to, and generally I've found that I get the best results when using PBR Metallic Roughness. And usually the default settings are perfectly fine. If you have a specific texture template that you would like to use, you can pick that here. If everything looks good to you, then just click Export. You're done. From here, you literally just drag everything into your principle shader and blender. Now if you have any problems dragging in your maps, for example, if your roughness looks weird, type Shift A, S, Invert, and place it in between like this, and adjust the levels until it looks better. Same thing with the normals, press Shift A, S, Normal Map, and drag the values like this and adjust the levels until you are happy with what you see. But yeah, that's how you export textures. Hope that helps, and as always, I hope you have a fantastic day, and I'll see you around.