To view what is inside, you will need a utility that supports the .7z (7-Zip) format.

The "deep content" might refer to high-resolution textures, complex mesh layers, or a specific "Deep" version of a character mod (sometimes used to denote NSFW variants or highly detailed "deep-dive" design files). How to Access the Content

You will likely find folders for Textures , FBX (3D models), or Prefabs if it is a game asset.