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Backup NAS disk - Full Disk Access warnings

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Using Retrospect 17.5.2 on Catalina, Full Disk Access is set up for RetrospectEngine and RetrospectInstantScan. I don't get warnings about Full Disk Access for the internal disk or an external drive. However, when the script runs for a Synology NAS disk that is mounted, I get the error:

Retrospect has detected it is not listed under "Full Disk Access" on the backup source system 
    and cannot access all user data to create a complete backup. Please follow our step-by-step guide: 

I am mounting with SMB, with Retrospect doing the mounting (I created a separate user on the Synology for retrospect with access to the share it needs to mount).

The backup appears to be working. So the only issue here is the error so I have to check each time to see if it was just that error or a real error.

Any idea how to work around this? 

FWIW, I don't have AFP enabled on the Synology, so both the backup and any users are using SMB to connect.


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Check by using the RS Console to "browse" the mounted volume. If you can, and given that your backups are working, you can consider it a spurious alert message.

(Full Disk Access -- SystemPolicyAllFiles -- includes SystemPolicyRemovableVolumes so Engine and Instant should be OK.)

My favourite quote about FDA/F&F is "Currently, this system is so complex that it appears unpredictable." I guess that extends to application's error messages, too 😉 

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Alex, did you make sure that the RetrospectEngine and RetrospectInstantScan items in the Full Disk Access pane (Sys Prefs: Security & Privacy > Full Access) are actually ticked?

This is important, as you, the user have to manually authorise those programs to start using full access. If unticked, it's just a provisional level of access.

Assuming this has now been done, any further errors should go away.

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