Originally Posted by urbie
I know, but where ? Removing brackets on the reader was just a test. In the metadatafield "Tags" on Calibre i just filled in the plain Tag name.
"Tag" or "tags"? If you have the Collection creation field correctly set to just "tags" I would have expected Calibre to have created a collection on the device called "Gezondheid" as that appears to be the entry in the tags field.