Quote:
Originally Posted by randy@asa3.org
I copied the folder with the files to the desktop
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Is this the folder with the files you are trying to add or the folder where your Calibre Library is?
The issue with using Calibre on a NAS is not so much where the files you are adding are stored but more to do with where your Calibre Library is stored.
CantOpenError: CantOpenError: unable to open database file
This would indicate that the issue is that your Calibre Library (and database) is on a shared drive, or that something else is locking/blocking it.
Move the Calibre Library to a local drive and then use the Switch library feature to link Calibre to this new library location.