Sync archives README with dataset card

archives/README.md

@@ -1,22 +1,9 @@
 # Archives
 
-One zip per benchmark. Unzip into your **`data/`** directory (same layout as [official DA360 eval](https://github.com/antigravity-tech/DA360)).
+| File | Benchmark | Size (approx.) |
+| ---- | --------- | -------------- |
+| [Metropolis.zip](Metropolis.zip) | Outdoor ERP test set | 3.1 GB |
+| [Matterport3D.zip](Matterport3D.zip) | Indoor test (18 scenes) | 2.8 GB |
+| [Stanford2D3D.zip](Stanford2D3D.zip) | Indoor Area 5 test | 0.9 GB |
 
-| File | Benchmark | Approx. size |
-|------|-----------|--------------|
-| [Metropolis.zip](Metropolis.zip) | Outdoor ERP test set | ~3.1 GB |
-| [Stanford2D3D.zip](Stanford2D3D.zip) | Indoor (`area_5a`, `area_5b`) | ~0.9 GB |
-| [Matterport3D.zip](Matterport3D.zip) | Indoor (4 scenes) | ~2.8 GB |
-
-Each archive expands to a top-level folder named after the benchmark, e.g. `data/Metropolis/rgb/`, `data/Matterport3D/{scene}/…`.
-
-**Quick unzip (from repo root):**
-
-```bash
-mkdir -p data
-for z in Metropolis Stanford2D3D Matterport3D; do
-  unzip -q "archives/${z}.zip" -d data
-done
-```
-
-Or use [`../scripts/prepare_data.sh`](../scripts/prepare_data.sh) to download from the Hub and extract automatically.
+Unzip into `../data/` (see [dataset card](../README.md#download)).