diff --git a/Data-Backup.md b/Data-Backup.md
index 04ee216..d1a9ad3 100644
--- a/Data-Backup.md
+++ b/Data-Backup.md
@@ -14,3 +14,8 @@ If local volume 5 does not exist, it will be created. All remote needle entries
 If you specify -volumeId=87, but volume 87 does not exist, it's ok. No files will be created locally. This gives the opportunity that you can create a backup script simply looping from 1 to 100. All existing volumes will be backed up. The non-existing volumes can also be backed up when they are created remotely.
 
 The backup scripts is just one command, not a continuous running service though. High Availability servers will be added later.
+
+# ToDo
+* how to do a consistent backup on a distributed environment (as backup is incremental and for instance done hourly, what is the strategy to restore data of 2 days ago (use filesystem snapshot ? again how to do on distributed environment) 
+* How to test a backup
+* How to restore data (with indication on distributed environment) 
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