/3/ - 3DCG

So I have this thing and it has "links" to other .blend files (for screen part & button part. highlighted them using red rectangle).

Bottom model is the exported stl file (loaded in Cura, a 3d printing slicer software)

Apparently I can't export things correctly if it is linked like this? Tried exporting as stl and the linked parts are not included. Tried a couple other formats and they either fail or exports incorrectly

I guess solution is not to link items or am I missing anything