diff --git a/webservice/webservice.py b/webservice/webservice.py
index 836829118b8d9c14eeaa376711d22e6192050829..8e9bfc9a343f8c288cd7b058c6a30cf688b6a3bb 100644
--- a/webservice/webservice.py
+++ b/webservice/webservice.py
@@ -9,6 +9,7 @@ import json
 import locale
 import logging
 import os
+import re
 import sqlite3
 import sys
 import time
@@ -445,6 +446,12 @@ def update_job_db(config):
         time.sleep(time_interval)
 
 
+# Do not copy over files of big detectors when they are not being
+# corrected.
+copy_blocklist_pattern = re.compile(
+    r'\S*RAW-R\d{4}-(AGIPD|LPD|DSSC)\d{2}-S\d{5}.h5$')
+
+
 async def copy_untouched_files(file_list):
     """ Copy those files which are not touched by the calibration
     to the output directory.
@@ -454,6 +461,9 @@ async def copy_untouched_files(file_list):
     Copying is done via an asyncio subprocess call
     """
     for f in file_list:
+        if copy_blocklist_pattern.match(f):
+            continue
+
         of = f.replace("raw", "proc").replace("RAW", "CORR")
         cmd = ["rsync", "-av", f, of]
         await asyncio.subprocess.create_subprocess_shell(" ".join(cmd))