I know this is old but just in case you want to do what OP asked: just use content browser in UE4, go to the folder, select all meshes and press right click. Wait for it to finish and the shaders will be compiled. This is the same as dragging all of them to the scene, as cyaoeu said, but I guess easier so you don’t have to delete them later (and easier if you have dynamic lightning and such)
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