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
Copy all files ending in .householdbinary , .trayitem , and .s4i into your Tray folder.
Custom skins or "skinblends" to match the real-life likeness. Hair & Eyes: Specific hairstyles and contact lens CC. The file is a "Sims 4 Import" package
In the game's Gallery/Library, ensure you check the "Include Custom Content" box on the left-hand filter panel, or the Sim will not appear. Required Cheats for Editing
These are the character data files (e.g., .householdbinary , .trayitem , .s4i ). They must be placed in your Documents > Electronic Arts > The Sims 4 > Tray folder to make the Sim appear in your in-game Library. Custom skins or "skinblends" to match the real-life likeness
The outfits and cosmetic layers shown in the character's preview images. Installation Guide
If you wish to further modify the Sim's physical attributes after importing, you will need to enable : Open the cheat console ( Ctrl + Shift + C ). Type testingcheats true and hit Enter. Type cas.fulleditmode and hit Enter. Shift-click the Sim and select "Edit in CAS." Required Cheats for Editing These are the character
Use a tool like 7-Zip or WinRAR to open the file.