Re: How do I uninstall Sims 4 add-ons
@JMMilne There is no official way to uninstall packs without uninstalling the entire game. And even then, the EA App will try to download those packs again even if you initially deselect them and disable automatic game updates.
If you really need the space, I can offer a somewhat janky workaround. But keep in mind that even the largest expansion pack is only about 3 GB in size, with some being more like 1 GB and game and stuff packs being significantly smaller. If you're that pressed for storage, a better bet would be to buy an external drive and transfer some data to that, for example you could install Sims 4 on the external or move your user data there.
Let me know what you'd like to do.