Obviously i do something wrong, i just imported a model only with the meshes but it takes forever, Unreal is creating thumbnails and simultaneously updating shaders, for a lot of meshes. How can i export my model in a slim version with just the essentials? Thanks
Quick fix: Select all objects in Blender and then in Edit Mode use CTRL - J to merge all objects to a single object. Additionally i exported only “Selected parts” and in Unreal import settings unticked Animation.