In changing to a hosted environment, we weren't certain that all previous users had been embedding (rather than linking) media files to records; links to linked records are broken when the database is moved to the hosted environment. There is no way to identify whether media files are embedded or linked, so there was no way for us to review our files and embed those that had been linked. There's also no way to see the path of the link, so even if we had been able to id linked files, we probably wouldn't have been able to find the file itself.