Nanni,
The function "restore to factory defaults” is 100% non-destructive.
It is NOT possible to loose the data using it.
It must be other reason you can not see your data. In order to investigate it, we need to receive NAS server logs.
Please goto menu “status->hardware->logs->download” save the zip file on your PC and send via e-mail to support@open-e.com.
Thank you.


Best Regards
Janusz