Slow saves

How many "named layer filters" are there? They get transferred from drawing to drawing. If you have many, try this little routine to delete them all. ;downloaded from AcadX.com, author: R. Robert Bell
(defun C:LayerFiltersDelete () (vl-Load-Com) (vl-Catch-All-Apply '(lambda () (vla-Remove (vla-GetExtensionDictionary (vla-Get-Layers (vla-Get-ActiveDocument (vlax-Get-Acad-Object)))) "ACAD_LAYERFILTERS"))) (princ "\nAll layer filters have been deleted.") (princ))
(defun C:LFD () (C:LayerFiltersDelete))
Or, if you want to save some of them, use this one.
;;Original code to delete all layer filters by R. Robert Bell. ;;Heavily modified to delete only specific filters by ;;Jeff Mishler, December 2003
(defun c:filtrdel (/ names dicts) (vl-Load-Com) (princ "\nRoutine to delete all but the specified Layer filters. When entering filter names to retain, wildcards are allowed. i.e., entering \"zz*,xx*\" will delete all filters except those beginning with zz and xx.") (setq names (getstring "\nEnter filter names to retain, press Enter for none: ")) (vl-Catch-All-Apply '(lambda () (setq dicts (vla-GetExtensionDictionary (vla-Get-Layers (vla-Get-ActiveDocument (vlax-Get-Acad-Object) ) ) ) ) (vlax-for dict dicts (if (and (= (vla-get-name dict) "ACAD_LAYERFILTERS") (> (vla-get-count dict) 0)) (progn (vlax-for filtr dict (if (not (wcmatch (vla-get-name filtr) names)) (vla-delete filtr) ) ) ) ) ) ) ) (princ "\nSpecified layer filters have been deleted.") (princ) )

Tried it. It cleaned up the layer filters, but this had no effect on the slow save problem. Thanks for trying to help me.

If the drawings have a lot of ttf text, that might be the problem.

...hatches.

Check how many objects are in the drawing. It may be that there are a number of objects that are not in plain view. Sometimes, if the drawing size is big, it takes a while to save the data. I would try to find out how many objects there are in the drawing, and see if that is what it is. It is a possibility that there are lines over lines over lines.