diff --git a/Async-Backup.md b/Async-Backup.md
index 4394eb9..d0acc60 100644
--- a/Async-Backup.md
+++ b/Async-Backup.md
@@ -51,7 +51,17 @@ is_incremental = false
 1. Make sure the `replication.toml` is in place.
 1. Start the backup by running `weed filer.backup`.
 
-# Incremental Mode
+Unless interrupted, the `weed filer.backup` will run continuously and keep retrying if any error happens. 
+
+The `weed filer.backup` process can also be stopped at any time. The current backup progress, which is the "offset" for normal message queues, is stored on filer with the key as `<sink_name, sink_folder>`. So to resume, you can just restart, or even start from another server, as long as you have the same `replication.toml` file
+
+# Backup Strategies
+
+There are 2 backup strategies supported as of now:
+1. Continuously replicated changes. All the content are stored with the same directory structure as the source, but in a remote machine or a cloud vendor.
+2. 
+
+## Incremental Mode
 If `is_incremental = true`, all the files are backed up under the `YYYY-MM-DD` directories, which the timestamps are based on modified time.
 So 
 * Each date directory contains all new and updated files.