File Size Management - Move Sheets, Annotations to New Revit Model

I am trying to find if it is possible to take sheets out of one model and copy it into a Sheets Revit file. I know how to copy sheets and views but I will need to bring annotation with those views.

Little background is that I have a project that is currently sitting at the 1.9GB file size with 30,000 plus views (floorplans, sections, assemblies, schedules and the like). Modeling efficiency is a problem, opening time and syncing times is horrible. Hind sight would be multiple files by floors but we have never done a project of this size.