diff --git a/env.example b/env.example
index b238ad6d..b73b4ad0 100644
--- a/env.example
+++ b/env.example
@@ -19,6 +19,7 @@
 #DATABASE_FILE=db.sqlite
 #METRICS_DATABASE_FILE=metrics.sqlite
 #LOGS_DIR=logs
+#DATA_DIR=
 
 #LOCALHOST
 #ADMIN_TOKEN=
diff --git a/src/services/storage/metricsEventStorage.ts b/src/services/storage/metricsEventStorage.ts
index a1447883..b340bd96 100644
--- a/src/services/storage/metricsEventStorage.ts
+++ b/src/services/storage/metricsEventStorage.ts
@@ -15,8 +15,8 @@ export default class {
     lastPersistedCache: number = 0
     constructor(settings: StorageSettings) {
         this.settings = settings;
-        this.metricsPath = [settings.dataDir, "metric_events"].join("/")
-        this.cachePath = [settings.dataDir, "metric_cache"].join("/")
+        this.metricsPath = [settings.dataDir, "metric_events"].filter(s => !!s).join("/")
+        this.cachePath = [settings.dataDir, "metric_cache"].filter(s => !!s).join("/")
         if (!fs.existsSync(this.cachePath)) {
             fs.mkdirSync(this.cachePath, { recursive: true });
         }