diff --git a/Gateway-to-Remote-Object-Storage.md b/Gateway-to-Remote-Object-Storage.md
index acd2f51..9f729a5 100644
--- a/Gateway-to-Remote-Object-Storage.md
+++ b/Gateway-to-Remote-Object-Storage.md
@@ -18,6 +18,10 @@ The `weed filer.remote.gateway -createBucketAt=cloud1` process can mirror local
 * Local deleted buckets will be automatically deleted in its remote storage.
 * All local changes under the mounted buckets are uploaded to its remote storage.
 
+# Assumption
+
+One or more cloud storages have been configured following [[Configure Remote Storage]] .
+
 # Setup Steps
 
 ## 1. (Optional) Mount all existing remote buckets as local buckets