They're all Taiwanese companies - QNAP, Synology, and D-Link (which makes/made? the WD MyCloud NAS). The difference is, that to my knowledge neither QNAP nor Synology were caught with a backdoor; and they have frequent security updates.
OTOH WD failed to remove a backdoor which was already fixed in the D-Link software. And since their NAS are/were? made by D-Link the argument that it's the same manufacturer doesn't quite work
For photographic purposes I'm mostly concerned about data lost. However - while I didn't tested it... yet! - AFAIK the QNAP backup application supports AES256 client-side encryption (L.E. for Cloud Backup. Other backup applications might have different options)
Just remember to keep backups of the encryption key... if you're paranoid, print it and put it into a safe.
L.E. Actually it's a password, from which the AES256 key is generated. In the event the NAS is unavailable, you can decrypt the files using openssl (and said password).
OTOH WD failed to remove a backdoor which was already fixed in the D-Link software. And since their NAS are/were? made by D-Link the argument that it's the same manufacturer doesn't quite work
For photographic purposes I'm mostly concerned about data lost. However - while I didn't tested it... yet! - AFAIK the QNAP backup application supports AES256 client-side encryption (L.E. for Cloud Backup. Other backup applications might have different options)
Just remember to keep backups of the encryption key... if you're paranoid, print it and put it into a safe.
L.E. Actually it's a password, from which the AES256 key is generated. In the event the NAS is unavailable, you can decrypt the files using openssl (and said password).