diff --git a/README.md b/README.md
index cc62e75..a4d3675 100644
--- a/README.md
+++ b/README.md
@@ -42,7 +42,7 @@
 - --port=[NUMBER]
 - --prefix=[CONTEXTPATH]
 
-To upgrade GitBucket, only replace gitbucket.war.
+To upgrade GitBucket, only replace gitbucket.war. All GitBucket data is stored in HOME/gitbucket. So if you want to back up GitBucket data, copy this directory to the other disk.
 
 Release Notes
 --------