Version: DSM 4.1-2567 Read before Applying The DSM 4.1 beta is for evaluation purpose only. It is suggested that you always back up data on your Synology NAS to other locations first. Synology holds no responsibility for any data loss caused by the DSM 4.1 beta. The DSM 4.1 beta is NOT REVERSIBLE; you will not be able to downgrade the DSM on your Synology NAS to a previous version. The DSM 4.1 beta can only be applied to Synology NAS with DSM 4.0-2198 and onward. You are encouraged