Copy all .package files into your Documents > Electronic Arts > The Sims 4 > Mods folder.
The zip file usually contains two main components required for the Sim to appear correctly in your game:
The Sims 4: How to Edit Pre-Existing Sims – Complete Guide - G2A News Copy all
A collection of .package files. These include the specific assets used to create Ai Uehara's look, such as:
Custom skins or "skinblends" to match the real-life likeness. Hair & Eyes: Specific hairstyles and contact lens CC. Hair & Eyes: Specific hairstyles and contact lens CC
The outfits and cosmetic layers shown in the character's preview images. Installation Guide
Use a tool like 7-Zip or WinRAR to open the file. The file is a "Sims 4 Import" package
The file is a "Sims 4 Import" package commonly found on community modding sites. These archives are designed to allow players to easily install a specific Sim with all their custom content (CC) pre-packaged. Typical File Content