Add dataset card and restore instructions

README.md

@@ -0,0 +1,26 @@
+---
+pretty_name: K Data
+---
+
+# K Data
+
+Large data archives split into 10 GiB parts for reliable transfer.
+
+## Restore
+
+Download the repository, then run:
+
+```bash
+mkdir -p restored_hub_data1
+cat hub_data1/archive.tar.part-* | tar -xf - -C restored_hub_data1
+
+mkdir -p restored_hub_data3
+cat hub_data3/archive.tar.part-* | tar -xf - -C restored_hub_data3
+```
+
+Verify each set before extraction:
+
+```bash
+(cd hub_data1 && sha256sum -c SHA256SUMS)
+(cd hub_data3 && sha256sum -c SHA256SUMS)
+```