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The scripterror can be deleted and the files that have the Cache.package extension at the end can be deleted. The cache files will regenerate fresh. I also delete my sims3logs file and sims3launcherlog file because I don't care about the achievement tracking. If you don't care about old video recordings, you can delete or move that file out as well. Same with screenshots. I tend to add a number unto the end of those when I am writing long stories and don't keep any more than 50-100 screenshots in them. Both files will regenerate fresh when you take a screenshot or movie in your game. I add a featureditems text file and delete the .txt extension to keep the featured items folder from regenerating after I delete that. You can safely move out or delete all files in the DCBackup folder EXCEPT the ccmerged file. Personally, I prefer to MOVE them somewhere safe rather than delete as those package files can all be put in the MODS folder if you ever can't get the items to show in your game normally.