Every time you add or remove furniture, delete the CASPartCache.package , compositorCache.package , scriptCache.package , and simCompositorCache.package files from your Documents\Electronic Arts\The Sims 3 folder as shown in this guide.
Every time you add new furniture, delete the cache files in your main Sims 3 documents folder. Safe files to delete include CASPartCache.package , scriptCache.package , and compositorCache.package . the sims 3 furniture cc folder
Keep your overall Mods folder size reasonable. A furniture folder ranging between 1GB to 3GB is generally safe for mid-range computers. Avoid dropping a 20GB mega-folder straight into your game without testing. Every time you add or remove furniture, delete
Instead of clicking "download" on fifty different websites, you download one or two compressed files containing hundreds of categorized items. Keep your overall Mods folder size reasonable
Unlike Sims 4, Sims 3 does not support subfolders deeper than one level inside Packages by default. You can enable multi-level subfolders by editing your Resource.cfg file, but most players keep furniture files directly in labeled folders like Furniture or Buy Mode .