I have a file that is super large and I have purged it and it’s still 243MB…If I cut and paste it into another file it’s less than 1 MB. It’s not really an issue for me now but I thought I would bring it up anyway. I can post the file if Ya’ll want to look it over.
Can you try TestPurgeBitmapTable on the file and see if it helps? Maybe some large textures got stuck in there. Other possibility is some plug-in left some data behind…