@aflasch26 Lag can have a LOT of causes in-game. Just a few to check for:
- a really large localthumbcache file - try deleting that. You'll have slower load of Manage Households at first, but otherwise lots might speed up
- a really large Tray file - that's your Library, and you can move it to your desktop when you don't need to use it
- settings too high for your computer
- lots and lots of interactable objects on a lot, especially combined with lots of Sims