diff --git a/infra/deploy-runner/nodedc-deploy b/infra/deploy-runner/nodedc-deploy
index c523592..f184a0f 100755
--- a/infra/deploy-runner/nodedc-deploy
+++ b/infra/deploy-runner/nodedc-deploy
@@ -1053,8 +1053,18 @@ def run_compose(component, services):
     subprocess.run([*compose_base_cmd(component), "ps"], cwd=str(compose_root), check=True)
 
 
+def prepare_component_runtime(component):
+    if component != "bim-viewer":
+        return
+
+    data_root = component_root(component) / "server" / "data"
+    for rel in ("uploads", "projects", "shares", "models", "comments"):
+        (data_root / rel).mkdir(parents=True, exist_ok=True)
+
+
 def run_component_runtime(component, entries, services):
     run_build(component, entries)
+    prepare_component_runtime(component)
     run_compose(component, services)
 
 
diff --git a/infra/synology/README.md b/infra/synology/README.md
index 94096ce..c09d915 100644
--- a/infra/synology/README.md
+++ b/infra/synology/README.md
@@ -279,6 +279,7 @@ The `bim-viewer` runner component:
 
 - applies payload under `/volume1/docker/nodedc-platform/bim-viewer/source`;
 - rejects `.env`, `server/data`, upload/model/comment/share runtime storage, `node_modules`, `.git`, shell hooks and backup files;
+- prepares required live runtime directories under `server/data` before compose;
 - builds `nodedc/bim-converter:local` from `converter/Dockerfile`;
 - recreates only `ndc-beam-viewer` and `nodedc-bim-converter`;
 - healthchecks `http://127.0.0.1:18100/api/auth/session`.