@badw0lf11 You can simply drag and drop or copy and paste the files: they go in their respective subfolders (saves, Tray, Mods) inside Documents > Electronic Arts > The Sims 4. Test your mods first, and if the game stops loading, you'll need to split and retest them until you figure out which ones are causing the problem. Leave your saves for last.
It's also a good idea to back up your saves, now and in general, in case you need them later. Many of us make backup copies regularly and delete the oldest ones when we know we won't need them.