Backup files from Lightroom have T attribute set, so some backup software ignores them.

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  • Updated 4 years ago

This conversation has been merged. Please reference the main conversation: Lightroom Classic: Backup 'extended attributes' prevent backup software working

The T attribute on Windows files is described by Microsoft as:

"The file is temporary. A temporary file contains data that is needed while an application is executing but is not needed after the application is finished. File systems try to keep all the data in memory for quicker access rather than flushing the data back to mass storage. A temporary file should be deleted by the application as soon as it is no longer needed."

It seems sensible therefore that backup software ignores these files, but I want my Lightroom backups backed up to my cloud storage.

I have worked around this for now by running a powershell script to remove this attribute as part of my backup process, but this should not be necessary.

This was not happening on earlier versions of Lightroom - the earlier files do not have this attribute set. It has taken several weeks in discussions with my backup software vendor to work out why my Lightroom backups were no longer being copied to my cloud storage.
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Dave Myler

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Posted 4 years ago

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