diff --git a/K-QMK-Series/K4 QMK/README.md b/K-QMK-Series/K4 QMK/README.md
index df04fa9..8ddf8bc 100644
--- a/K-QMK-Series/K4 QMK/README.md	
+++ b/K-QMK-Series/K4 QMK/README.md	
@@ -18,18 +18,25 @@
 | Hot-swap | Yes |
 | Firmware | QMK / Keychron Launcher |
 
-## Repository Status
+## Included Files
 
-CAD files for this model have not been added to this repository yet. This folder is prepared so related hardware design files can be dropped in later.
+| File | Description |
+|---|---|
+| `K4X-US-Aluminum-Plate_20260430.dwg` | US aluminum plate 2D CAD drawing |
+| `K4X-US-Bottom-Case_20260430.stp` | US bottom case 3D CAD model |
+| `K4X-US-PCB_20260430.dwg` | US PCB 2D CAD drawing |
+| `K4X_US_Cherry_Full_Model_20260420.stp` | US full keyboard 3D CAD model with Cherry profile keycaps |
+
+## Downloads
 
-## Planned File Types
+> **Download note:** If a download link does not respond, copy the link and paste it directly into your browser's address bar. All links below are hosted on Keychron's official server and are safe to use.
 
-| File Type | Purpose |
+| File | Download Link |
 |---|---|
-| `stp` / `step` | Case and assembly 3D models |
-| `dwg` | 2D plate and mechanical drawings |
-| `dxf` | Manufacturing-ready 2D geometry when available |
-| `pdf` | Reference drawings and dimension sheets |
+| `K4X-US-Aluminum-Plate_20260430.dwg` | http://www.keychron.co:34568/keychron-github-assets/Keychron-Keyboards-Hardware-Design/K-QMK-Series/K4%20QMK/K4X-US-Aluminum-Plate_20260430.dwg |
+| `K4X-US-Bottom-Case_20260430.stp` | http://www.keychron.co:34568/keychron-github-assets/Keychron-Keyboards-Hardware-Design/K-QMK-Series/K4%20QMK/K4X-US-Bottom-Case_20260430.stp |
+| `K4X-US-PCB_20260430.dwg` | http://www.keychron.co:34568/keychron-github-assets/Keychron-Keyboards-Hardware-Design/K-QMK-Series/K4%20QMK/K4X-US-PCB_20260430.dwg |
+| `K4X_US_Cherry_Full_Model_20260420.stp` | http://www.keychron.co:34568/keychron-github-assets/Keychron-Keyboards-Hardware-Design/K-QMK-Series/K4%20QMK/K4X_US_Cherry_Full_Model_20260420.stp |
 
 ## Links
 
diff --git a/README.md b/README.md
index 41c90a1..8a1ea66 100644
--- a/README.md
+++ b/README.md
@@ -15,6 +15,7 @@ Study real CAD. Remix plates and cases. Design compatible accessories. Learn fro
 
 ## Latest Updates
 
+- **2026-05-14:** Added K4 QMK files.
 - **2026-05-08:** Added BM25 and more K3 Pro files.
 - **2026-05-07:** Moved the download links for the files to the "Downloads section" of the "Readme file" within the corresponding product model folder. ** Added more K3 Pro files.
 - **2026-04-29:** Added more K4 Pro and more K8 Pro files.