A library is a collection of references. Each reference is stored as an individual record with different data fields for author, title, etc. You can have multiple EndNote Libraries. Alternatively, you can have one library and use the Groups feature to organize the references in a library into subcategories.
To get started:
Open the EndNote program on your desktop
From the top menu bar select File
Name the library and select the location where you want to save it.
NOTE: Save the library to a local folder, not a cloud or network location. Connection issues with cloud or network locations can lead to a corruption of the .enl file resulting in the complete loss of your library!
When you create a new library, another folder will automatically be created with the same name, but will be a data folder. You will see a .enl file and a .data file in your local folder. These two files must stay together in the same location for EndNote to open a Library.