Im trying to parse release for Mozart 225 with 200CD orginized I file system as folder per disc. All of them contains covert art inside each disc folder but this covers are not copied into resulting directory with default settings for local files, and also I still see 0 images on release page on the left.
You can move the files by enabling “Move additional files” in Options > File Naming. You can specify file patterns here, the default is already matching common image files. If this does not work for you, please tell us how exactly your files are named.
For tagging such releases I would suggest to disable Picards cover art options, since neither Picard nor MusicBrainz currently can handle per medium cover art unfortunately.