i am exporting a 1gb fbx into unreal editor. Its not moving!!!!anyhelp

Actually its an architectural project. I had an NWD(naviswork) file from which i exported the FBX with limited polygons to 100000 or something. i dont get the verts part.

My syspecs are a sfollows

32gb ram
i7 processor
RTX 8gb grahics.

Also tried in twinmotion not importing please help guys

Out of sheer curiosity - how many verts for 1GB fbx?