diff --git a/Cloud-Drive-Benefits.md b/Cloud-Drive-Benefits.md
index 77e291d..f228327 100644
--- a/Cloud-Drive-Benefits.md
+++ b/Cloud-Drive-Benefits.md
@@ -92,8 +92,8 @@ SeaweedFS Cloud Drive has these unique characteristics:
     * Accessing cloud data is slow and costly.
     * Recently uploaded files very likely need to be accessed again.
   * With SeaweedFS Cloud Drive
-    * Users can explicitly ask SeaweedFS Cloud Drive to uncache by file age.
-    * Users can also choose to never uncache, basically treating cloud copy as a backup.
+    * The local copy and remote copy can be backup for each other, if users choose not to uncache.
+    * To keep recent data in local copy, users can choose to only uncache files older than a limit.
 ## Big Data
   * Problem
     * Run MapReduce, Spark, and Flink jobs on cloud data is slow due to metadata operations.