1. Do you have enough room on your computer to store save files?
2. Back up your save files. Here is a guide on how to do that: http://help.ea.com/en/article/how-do-i-backup-my-saved-games-in-the-sims-3/ .
3. Delete your files in the save folder, but do not delete the save folder.
4. Take your backed up files, and put them in the saves folder.
Thanks.
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