That is not the full smart data.
WD NAS default diagnostics are notoriously unreliable.
You want to run SMART diagnostics using the app described here.
If the disks are less than 2-3 years old; I doubt there is anything wrong with them. I think if the disks are getting older; the NAS might automatically declare them bad. (not sure on that)
Regardless: I presume you can still access the data?
You need to create a backup for all the data on the NAS - -using standard copy tools.
(you would get this recommendation regardless of NAS drive health)
