[pembrook]

Yes, Lightroom has nothing to do with it. Seems like that’s simply the app that the author is using to view the files.

The title of this post should be changed to “file transfers from MacOS to Synology NAS causes file corruption”

It’s a known issue with no fix at the moment.

[otterley]

Known to whom? And do you have a reference to this information from either Apple or Synology?