Clarify network download size and disk usage after preparation

README.md

@@ -29,18 +29,20 @@ Pretraining for Language-Conditioned Local Navigation**.
 Choose a test subset to try navigation, or a training selection to prepare
 training videos and labels. Each download guide covers **all required sources**.
 
-| Dataset | Contents | Total download | Total data storage | Download |
+| Dataset | Contents | Network download | Disk usage after preparation | Instructions |
 | --- | --- | ---: | ---: | --- |
-| Habitat-GS-LN test subset | 16 tasks / 13 scenes | 991.32 MB | 2.96 GB | [Download](https://github.com/MachEmbodied/ScaleNav/blob/main/docs/EVALUATION.md#test-subset) |
-| Full Habitat-GS-LN evaluation | 157 tasks / 45 scenes | 3.17 GB | 10.36 GB | [Download](https://github.com/MachEmbodied/ScaleNav/blob/main/docs/EVALUATION.md#full-habitat-gs-ln) |
-| Short-Horizon OVON test subset | 7 tasks / 7 scenes | 642.85 MB | 642.90 MB | [Download](#ovon-test-subset) |
-| Full Short-Horizon OVON evaluation | 524 tasks / 36 scenes | 5.84 GB | 3.67 GB | [Download](https://github.com/MachEmbodied/ScaleNav/blob/main/docs/EVALUATION.md#full-short-horizon-ovon) |
-| Small training subset (for preview) | 17 Internet segments / 4 simulated episodes | 55.60 MB | 239.54 MB | [Download](https://github.com/MachEmbodied/ScaleNav/blob/main/docs/DATA.md#small-training-subset) |
-| Full training data | 18,249 Internet segments / 2,600 simulated episodes, including validation | 36.10 GB | 153.04 GB | [Download](https://github.com/MachEmbodied/ScaleNav/blob/main/docs/DATA.md#full-training-data) |
-
-Sizes use decimal MB/GB, rounded from file-byte totals. Total download counts
-files fetched from all sources; our labels are already included in the code
-repository. Total data storage includes prepared files and retained downloads.
+| Habitat-GS-LN test subset | 16 tasks / 13 scenes | 991.32 MB | 2.96 GB | [Prepare](https://github.com/MachEmbodied/ScaleNav/blob/main/docs/EVALUATION.md#test-subset) |
+| Full Habitat-GS-LN evaluation | 157 tasks / 45 scenes | 3.17 GB | 10.36 GB | [Prepare](https://github.com/MachEmbodied/ScaleNav/blob/main/docs/EVALUATION.md#full-habitat-gs-ln) |
+| Short-Horizon OVON test subset | 7 tasks / 7 scenes | 642.85 MB | 642.90 MB | [Prepare](#ovon-test-subset) |
+| Full Short-Horizon OVON evaluation | 524 tasks / 36 scenes | 5.84 GB | 3.67 GB | [Prepare](https://github.com/MachEmbodied/ScaleNav/blob/main/docs/EVALUATION.md#full-short-horizon-ovon) |
+| Small training subset (for preview) | 17 Internet segments / 4 simulated episodes | 55.60 MB | 239.54 MB | [Prepare](https://github.com/MachEmbodied/ScaleNav/blob/main/docs/DATA.md#small-training-subset) |
+| Full training data | 18,249 Internet segments / 2,600 simulated episodes, including validation | 36.10 GB | 153.04 GB | [Prepare](https://github.com/MachEmbodied/ScaleNav/blob/main/docs/DATA.md#full-training-data) |
+
+**Network download** is the amount transferred over the Internet from all sources;
+our labels are already included in the code repository. **Disk usage after
+preparation** is the local space occupied by the prepared data and retained
+downloads after completing the guide, including any cleanup.
+Sizes use decimal MB/GB, rounded from file-byte totals.
 Full OVON assumes the documented archive cleanup; allow 9.34 GB before cleanup.
 Model weights, environments, training latent caches and run outputs are separate.
 Exact download bytes and storage breakdowns are in the