EndNote is a subscription reference management service offered by Touro University Nevada that is designed to help researchers manage research projects. The service includes full-text and bibliographic management, collaboration features, and browser integration.
This is a very useful tool that can save you time.
EndNote allows creation of multiple libraries only in the desktop version. The EndNote Online only allows creation and syncing of one library. To create multiple libraries on the desktop version, EndNote recommends not using a cloud storage. For further details see https://support.clarivate.com/Endnote/s/article/EndNote-Reference-Manager-ProCite-Compatibility-with-Dropbox-and-other-Cloud-storage?language=en_US