How do you update a file name but keep references in drawing file?

I have to make a 3rd revision of a file for a client.

Revision 2 and 3 are very similar so I just copy and pasted the whole file and made the changes in the Assembly file and now i want to update the file name as revision 3.

Now I want the Drawing file to update these changes and also update the file name.

What is the best way to do this.

SolidworksGeneral