This building model has two modes one is day mode and other is night mode.
All files including texture and HDRIs are packed into bled file you can goto file dropdown menu and in external data unpack those files to get them into the specific folder
BLEND (Blender, filesize: 477 MB), OBJ (OBJ, filesize: 119 MB), FBX (Autodesk FBX, filesize: 8.13 MB), TEXTURES (Textures, filesize: 163 MB)