What you can do, before you save, do this:
From another thread, posted by me:
Here is what I do, works for me on Win 7,
Open My Documents, Electronic Arts, The Sims 3, Saves, and find mydynasty.sims3 and mydynasty.sims3.backup.
Drag "mydynasty.sims3" to your desktop and duplicate "mydynasty.sims3.backup" (copy mydynasty.sims3.backup. and
paste) and rename the duplicate to mydynasty.sims3
MyDynasty is your save file name....