hass-config/.storage/core.floor_registry

{
  "version": 1,
  "minor_version": 2,
  "key": "core.floor_registry",
  "data": {
    "floors": [
      {
        "aliases": [],
        "floor_id": "basement",
        "icon": null,
        "level": -1,
        "name": "Basement",
        "created_at": "2024-10-21T03:40:14.901129+00:00",
        "modified_at": "2024-10-21T03:40:14.901146+00:00"
      }
    ]
  }
}