diff --git a/.github/workflows/X-x86_64_Z.yml b/.github/workflows/X-x86_64_Z.yml
index cc5dd82..6072522 100644
--- a/.github/workflows/X-x86_64_Z.yml
+++ b/.github/workflows/X-x86_64_Z.yml
@@ -319,7 +319,7 @@ jobs:
     - name:  2 Upload SP_UEFI_VMDK to SharePoint
       uses: xopenwrt/s3-upload-github-action@master
       env:
-        FILE: ./${{ steps.date.outputs.date }}e/${{ env.SP_UEFI_VMDK }}
+        FILE: ./${{ steps.date.outputs.date }}/${{ env.SP_UEFI_VMDK }}
         S3_ENDPOINT: 's3.openwrt.115115.xyz'
         S3_BUCKET: ${{ secrets.S3_BUCKET }}
         S3_ACCESS_KEY_ID: ${{ secrets.S3_ACCESS_KEY_ID }}
diff --git a/AI_CHANGELOG_Z_S3_UPLOAD_PATH.md b/AI_CHANGELOG_Z_S3_UPLOAD_PATH.md
new file mode 100644
index 0000000..ae41ad4
--- /dev/null
+++ b/AI_CHANGELOG_Z_S3_UPLOAD_PATH.md
@@ -0,0 +1,12 @@
+# AI Modification Log: Z S3 Upload Path
+
+Date: 2026-06-28
+
+## Change
+
+- Fixed the Z workflow UEFI VMDK S3 upload path in `.github/workflows/X-x86_64_Z.yml`.
+- Changed `./${{ steps.date.outputs.date }}e/${{ env.SP_UEFI_VMDK }}` to `./${{ steps.date.outputs.date }}/${{ env.SP_UEFI_VMDK }}`.
+
+## Reason
+
+The extra `e` after the date output made the upload action look in a non-existent directory, causing the UEFI VMDK upload to miss the generated firmware artifact.