You get:

_3 different modular rock models(.fbx) with LODs already set up.

_5 different texture variants.

_Substance Painter File which you can use to update the textures and fit to your needs.

_Folder with exported textures in UEPacked, Unity HDRP, Unity URP formats( can also use the Substance File to export to the format that adheres to your needs).

Please see images above for poly counts. Renders done in Marmoset Toolbag; look results may vary depending on game engine, lighting, and shader set up. To open Substance Painter file you will need version 7.4.0 Build 1366 or higher.