Readynas 102 unavailable after some hours working

hello, after using some differents Readynas (Since redaynas duo, to 102-202 nas 104) Now I´m having and issue with a 104 (equipped with 2 WD RED for NAS 6Gb) and firmware 6.9.3

 

Since 4 or 5 weeks I have and issue, that my nas is not accesible through the net (I used NO IP services and everything is correct on it and at the router) when I restarted it it start working again for 1,5 or 2 days again and fail again.

 

I have tried to reinstall the firmware and it still failing again. And I can´t do it a fabric restore as I have to move up and down about 4 Tb th the cloud.

 

Any idea? the nas is working as an FTP service for backup 2 servers working at the cloud, and I´m using wasabi services also. ( I connect to the readynas by acronis FTP utility backup and plesk ftp utility backup, an I have been working like this withpout any problem for almost 1 year till now.)

 

Thank you in advance.