Sims 4 Using Up all my RAM

@smilelikemiles 

OK you say that the RAM on your Laptop can be upgraded so if you want to you can just take it to a shop and ask them to do it. Be warned that it will be unlikely to have any significant effect on your game.

A PC will use as much RAM as possible. This is not limited to your game but Windows and what else you have running on it.

If you post a DxDiag. https://help.ea.com/en-us/help/pc/how-to-gather-dxdiag-information/ I may be able to see a reason for lag but the game by itself will occasionally lag a bit. That is just the way it is programmed.
You can attach the txt file directly to your answer.