The other type of custom content is downloaded as. If you didn't create the Mods and Packages folders and put any files inside, then you don't have to worry about this. package-based files: these are installed into Mods > Packages just like mods are. There are two types of custom content in Sims 3. All user data, everything you create or download into your game, is stored in Documents > Electronic Arts > The Sims 3.