diff --git a/.env.example b/.env.example
index 95f1546..b13016d 100644
--- a/.env.example
+++ b/.env.example
@@ -27,14 +27,18 @@ S3_ACCESS_KEY=minioadmin
 S3_SECRET_KEY=minioadmin
 
 # SeaweedFS live example (preferred aliases also work without S3_*):
-# Use the public HTTPS URL (SERVICE_URL_S3). Port 8333 is often internal-only.
+# Use the public HTTPS URL (SERVICE_URL_S3). Never use plain http:// for the public host —
+# Coolify/Traefik returns HTTP 307 and AWS SDK PutObject cannot follow it.
+# Do NOT use :8333 from outside the SeaweedFS network (often refused).
 # S3_ENDPOINT=https://s3.game-no.ir
 # SERVICE_URL_S3=https://s3.game-no.ir
-# SERVICE_URL_S3_8333=https://s3.game-no.ir:8333
 # SERVICE_USER_S3=...
 # SERVICE_PASSWORD_S3=...
 # AWS_ACCESS_KEY_ID=${SERVICE_USER_S3}
 # AWS_SECRET_ACCESS_KEY=${SERVICE_PASSWORD_S3}
+#
+# File uploads: multer uses MEMORY storage and streams the buffer straight to the
+# S3 temp bucket. No Coolify persistent volume / uploads folder is required for this.
 
 S3_TEMP_BUCKET=temp
 S3_CERTIFICATES_BUCKET=certificates
diff --git a/config/config.js b/config/config.js
index 4991db9..6f4823a 100644
--- a/config/config.js
+++ b/config/config.js
@@ -31,11 +31,25 @@ const config = {
 
   // S3-compatible storage (MinIO locally, SeaweedFS in production)
   // Accepts S3_* directly, or SeaweedFS/AWS service env aliases from the host platform.
-  S3_ENDPOINT:
-    process.env.S3_ENDPOINT
-    || process.env.SERVICE_URL_S3
-    || process.env.SERVICE_URL_S3_8333
-    || 'http://localhost:9000',
+  // IMPORTANT: use https:// for public SeaweedFS — http:// gets a 307 that AWS SDK cannot follow on PUT.
+  S3_ENDPOINT: (() => {
+    const raw = (
+      process.env.S3_ENDPOINT
+      || process.env.SERVICE_URL_S3
+      || process.env.SERVICE_URL_S3_8333
+      || 'http://localhost:9000'
+    ).trim().replace(/\/$/, '');
+
+    // Upgrade plain http → https for non-local endpoints (Coolify/proxy 307 breaks PutObject)
+    const isLocal = /^(http:\/\/)?(localhost|127\.0\.0\.1|minio)(:|\/|$)/i.test(raw)
+      || raw.startsWith('http://localhost')
+      || raw.startsWith('http://127.0.0.1')
+      || raw.startsWith('http://minio');
+    if (raw.startsWith('http://') && !isLocal) {
+      return `https://${raw.slice('http://'.length)}`;
+    }
+    return raw;
+  })(),
   S3_REGION: process.env.S3_REGION || process.env.AWS_REGION || 'us-east-1',
   S3_ACCESS_KEY:
     process.env.S3_ACCESS_KEY
@@ -59,10 +73,17 @@ const config = {
   ),
   SIGNED_URL_EXPIRES_IN: parseInt(process.env.SIGNED_URL_EXPIRES_IN, 10) || 900, // 15 minutes default
   // Public base URL for public buckets only (private buckets leave fileUrl empty)
-  S3_PUBLIC_BASE_URL:
-    process.env.S3_PUBLIC_BASE_URL
-    || process.env.SERVICE_URL_S3
-    || '',
+  S3_PUBLIC_BASE_URL: (() => {
+    const raw = (
+      process.env.S3_PUBLIC_BASE_URL
+      || process.env.SERVICE_URL_S3
+      || ''
+    ).trim().replace(/\/$/, '');
+    if (raw.startsWith('http://') && !/localhost|127\.0\.0\.1/i.test(raw)) {
+      return `https://${raw.slice('http://'.length)}`;
+    }
+    return raw;
+  })(),
   S3_CERTIFICATES_PUBLIC: parseBool(process.env.S3_CERTIFICATES_PUBLIC, false),
   S3_DOCUMENTS_PUBLIC: parseBool(process.env.S3_DOCUMENTS_PUBLIC, false),
   // SeaweedFS admin console (optional; not used by the S3 SDK client)
diff --git a/utils/s3Client.js b/utils/s3Client.js
index 496d89d..1bae207 100644
--- a/utils/s3Client.js
+++ b/utils/s3Client.js
@@ -80,6 +80,12 @@ const logS3Error = (label, error) => {
     + (status ? ` (HTTP ${status})` : '')
     + (bodyPreview ? ` body=${bodyPreview.replace(/\s+/g, ' ')}` : '')
   );
+  if (status === 307 || /Temporary Redirect/i.test(String(error.message) + bodyPreview)) {
+    logger.error(
+      '[S3 Storage ERROR] Hint: HTTP 307 means S3_ENDPOINT is redirecting (often http→https). '
+      + `Set S3_ENDPOINT=https://… (current: ${config.S3_ENDPOINT}). AWS SDK does not follow PUT redirects.`
+    );
+  }
 };
 
 const uploadToTempBucket = async (fileBuffer, filename, contentType = 'application/octet-stream') => {