Unable to link container to shared QNAP folder - Caliber

Hi,

I’m a noob on both Qnap containers and on docker.

I’m trying to setup the server and have a shared folder Books in which are all my ebooks and the metadata.db file.

Each time I create the container one of the locations for either /config or /books (that as far as I can see are correct - see screenshots attached) maps correctly to the shared folder, but the other one maps to a newly created folder in the Container>Docker folder.

Is it NOT possible to map both to the same shared folder (though this is how my install of Caliber works with ebooks and metadata in the same folder)?

I’d appreciate any insights. Create Container settings are in screen shots in the link below.

Cheers

Nobody any thoughts?