ReadyNAS X6 is now called what?

OK, Chirpa, thanks for the memory advisory. As for the X-raid expansion, I was not even aware of this possibility. However, taking your advice, I'll start all over. This is a procedure I found somewhere:
1.Backup all data
2.Verify backup is good
3.Upgrade to latest RAIDiator for your NAS if you haven’t already. You can check the latest version of RAIDiator under System > Update > Remote in Frontview. If a newer version than what you’re running is offered, update. Be sure to reboot the NAS when prompted to complete the update.
4.Optional – If you don’t want to reconfigure the NAS manually and would rather restore the NAS configuration after the factory reset, do a System > Config Backup (keep the zip file that is downloaded as this is what you will need to restore later).
5.Power down the NAS, remove old disks (label order) you no longer wish to use in the NAS, if any.
6.Put the new disks in the NAS and do a factory default using the ReadyNAS boot menu
7.Optional – if you don’t want to reconfigure the NAS manually, restore the Config Backup.
8.Restore data from backup

Is this still correct?

Johan.