Update main.py

main.py

@@ -28,7 +28,7 @@ class TransferManager:
         if filesize > MAX_FILE_SIZE:
             raise ValueError("File size exceeds maximum limit")
             
-        transfer_id = ''.join(random.choices(string.ascii_letters + string.digits, k=16))
+        transfer_id = ''.join(random.choices(string.ascii_letters + string.digits, k=4))
         file_path = os.path.join(app.config['UPLOAD_FOLDER'], transfer_id)
         
         with lock: