>>291203232
>If I delete the shaders that came with Model B, will the Model B work even though the shaders from Model A are in a completely different folder? Yes, I believe in the case of shaders it refers to them by a name specified by the .shader file

Folder structure doesn't matter. Unity uses meta files to keep track of so you can reorganise your project as you see fit.

>>291203558
It's somewhere in the directory, you should get a prompt to save it if there were changes made.

I HIGHLY recommend spending a couple of hours doing the some of the basic official unity tutorials. You'll make way more progress than trying to pick it up as you go