diff --git a/Amazon-S3-API.md b/Amazon-S3-API.md
index ebf05c9..7b4da2c 100644
--- a/Amazon-S3-API.md
+++ b/Amazon-S3-API.md
@@ -21,7 +21,10 @@ In addition, you can also configure the per bucket storage this way in `weed she
 ```
  fs.configure -locationPrefix=/buckets/ -volumeGrowthCount=1 -apply
 ```
-This will add 1 physical volume when existing volumes are full. If using replication, you will need to add more volumes.
+This will add 1 physical volume when existing volumes are full. If using replication, you will need to add more volumes, so that it is a multiple of the number of replicas:
+```
+ fs.configure -locationPrefix=/buckets/ -replication=001 -volumeGrowthCount=2 -apply
+```
 
 See https://github.com/chrislusf/seaweedfs/wiki/Path-Specific-Configuration