Always back up your Electronic Arts\The Sims 3 folder (found in your Documents) before reinstalling or updating, as this contains your saves, mods, and downloads. 2. Installing Store Content
Install expansion and stuff packs in their original release order to avoid registry errors or compatibility issues. the-sims-3-installment-tutorials
Installed via the launcher, as described for Store content. Package Files (.package): These require a manual setup: Create a folder named Mods in your The Sims 3 directory. Inside Mods , create two subfolders: Packages and Overrides . Always back up your Electronic Arts\The Sims 3
For heavy store users, experts suggest keeping compressed Store files (found in the dccCache folder) under 200MB to maintain game performance. as this contains your saves
There are two primary ways to install CC, depending on the file format: