The-sims-3-installment-tutorials -
Install the base game first. Before adding any expansions, download the latest official patch from The Sims 3 Website to update the base game directly.
For heavy store users, experts suggest keeping compressed Store files (found in the dccCache folder) under 200MB to maintain game performance. the-sims-3-installment-tutorials
To ensure stability, it is recommended to install the game and its expansions in a specific order: Install the base game first