Install banshee-extension-albumartwriter by entering the following commands in the terminal:
sudo apt update sudo apt install banshee-extension-albumartwriter
Description:
Album art writer extension for Banshee
This package contains the Album Art Writer extension for Banshee which writes album art from the cache to the folder containing the music files. . Banshee is a media management and playback application for the GNOME desktop.
Homepage: http://gitorious.org/banshee-community-extensions
Version: 2.4.0-4ubuntu2
Section: universe/sound