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diff --git a/README.md b/README.md
index 40d53af..b58cbfa 100644
--- a/README.md
+++ b/README.md
@@ -22,6 +22,32 @@ just sync-cloud       # To cloud
 just status           # Check
 ```
 
+## Windows Setup (ext4 drives)
+
+```bash
+# 1. Identify drive (as Admin)
+wmic diskdrive list brief
+# Note: \\.\PHYSICALDRIVEN
+
+# 2. Mount raw drive (as Admin)
+wsl --mount \\.\PHYSICALDRIVE1 --bare
+# Block device now visible in all WSL instances
+
+# 3. In your WSL instance
+sudo lsblk                    # Find /dev/sdxN
+sudo mkdir /mnt/ext4drive
+sudo mount /dev/sdd1 /mnt/ext4drive
+sudo apt install rclone unison
+
+# Edit justfile: SOURCE="/mnt/ext4drive", set TARGET & CLOUD_REMOTE
+# 4. Run usync
+just sync-cloud
+
+# 5. Cleanup
+sudo umount /mnt/ext4drive
+wsl --unmount \\.\PHYSICALDRIVE1    # (as Admin)
+```
+
 ## Structure
 
 ```