We have a 2004 dwg file from a big contracting firm (that frequently sends us garbage) and I can't figure out why it's so bloody big! I received it in a 4MB ZIP file and the DWG file was 7.14MB and when I opened it and saved it, it ballooned to over 77MB! I deleted all of the layer filters, there's nothing left to purge out and this drawing, from first glance, doesn't appear to warrant even a 7MB file, but even after deleting filters, etc. it's still waaay up there.
Any ideas to throw out there?