Calibre Web Can’t See Mounted Calibre Drive

I’ve mounted a USB drive I have to my media folder and using portioned/docker running the calibre library/database. However, running the calibre web image, the initial setup asks for the location of the calibre database and it’s not seeing anything in the media folder?

You found the media folder but didn't find anything in?

Yeah so I've mapped the drives like this, when I fire up calibre-web and it asks for the DB location I try navigate to the media folder via the GUI and it doesn't show any sub-folders, it also doesn't work when I manually input the path.