Re: Issues with Managing Add-Ons in Sims 4

@Katylou43768  You'll need to uninstall the Origin version of Sims 4 and install the Steam version.  Download all the packs you own through Steam.  Then, if you own any packs through Origin, sign into Origin and download those packs as well.  They should go into the Sims 4 Steam install.

For more information, please see this guide:

https://sims4.crinrict.com/eng/2020/06/the-sims-4-steam-version/