Synology NAS Firmware up from old DSM 2.3-1139 to latest available DSM 4.2
Dear All
I have never upgraded synology NAS before, so I would like to ask before I go ahead to upgrade.
I would like to upgrade to latest DSM 4.2 from 2.3. Is it possible?
If it is not possible, what firmware in between should I upgrade to??
Generally, I would like to double confirm that my data (files) are safe during & after upgrade.