Broken Packs After Switching To External Drive

I have a MacBook Pro that was running low on storage and I had a Seagate drive so I transferred my game onto it. The game loads and all but everything from my packs is broken. Cas items turn my sims invisible with red and black squares and question marks. Build items are similar to what the cas items do and the world show up but they don’t have any lots at all. I tried uninstalling and reinstalling but it does the same thing. I redownloaded mods to see if they work and they don’t show up in game at all. Please help, I’ve tried everything and nothing has worked. I just want my game to work like it use to.