View bound xrefs

Hi, I'm not a Autocad Draftee. I'm a document controller that is trying to ID errors with 2600 drawings. Some files are so large - 250,000kb, they won't open. They have bound xref's in them. We want to ask the contractor to unbind them and attach them as normal xref's. I need to view if a drawing has bound xref's. How do I do that? I just want to SEEEEEEE...