: The naming structure (Part 2 of a 7z archive) is common for high-quality game mods or character "customs" for titles like The Sims or Epic Seven (where the character "Sinful Angelica" is noted for being surprisingly good ).
An archive tool like 7-Zip to "Extract" the first part, which will automatically stitch the segments together.
Could you clarify where you from or what type of content (e.g., game mod, 3D model, crafting kit) you are expecting it to be?