Mesh stl file exportation

hi everyone
I discovering the tool because i have to use it for an IT project and i need some help

I think it’s very simple, but I have to export a mesh which I had modified in stl format and by using grasshopper, i tested a lot of things and tried to see on internet but i didn’t found something which works

Can someone help me ?

thanks by advance !

Bake to rhino and run the check command to see if the mesh is good. Mesh repair if needed the export from rhino