ReadyNAS Pro doesn't save settings

[Strateg]

Hello my NAS Pro worked without problems 3 years, but here are a couple of days ago, suddenly lost all shared resources. Nas dropped all settings to default and does not want to save them.

Memory test complete w/o errors
Update RAIDiator to version 4.2.21 complete
Made OS Reinstall

Login to RAIDiator >> change any settings >> click Save >> settings resets to defaults

Please help me, I had a lot of necessary information on NAS.
Thanks

[StephenB]

I am wondering if you have a full OS partition.

I suggest that you use on-line support, and open a ticket.