diff --git a/Async-Replication-to-another-Filer.md b/Async-Replication-to-another-Filer.md
index eb97929..f26dd1d 100644
--- a/Async-Replication-to-another-Filer.md
+++ b/Async-Replication-to-another-Filer.md
@@ -54,3 +54,9 @@ Please read the source.filer and sink.filer configurations carefully and make su
 * Start the Kafka.
 * Start the replication. "`weed filer.replicate`"
 * Start the filer. "`weed filer`"
+
+# Replicate existing files
+
+The `weed filer.replicate` only replicates files that have been updated. If there are already a lot of files, very likely you would need to copy them too.
+
+To do this, use `weed filer.export -targetStore=notification`, which will iterate all files and generate one "file creation" event to the message queue. Thus, all files will be replicated.
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