There are two ways to save a backup copy of your EndNote Library.
The first is to save a copy. Every EndNote library is comprised of a .enl file and a .data folder. When you save a copy, your copy is in the exact same file format as your regular library (and hence contains both of these two files). You can use a copy library in the same way as your original library. When you transport a copy of your EndNote library between devices, it is important to move the .data folder and the .enl file together.
To save a copy of your EndNote library:
The second option is to create a compressed library.
When you save a compressed library, you create a single, smaller file, that combines your library file and data folder. This file is in a different file format to your EndNote library and must be un-compressed in order to use it (simply opening the file will do this)
To create a compressed library:
Note: If you opted to Create and Email, but are not working on your own computer, you will need to open your email and attach the file to send. If you are on your own computer, simply clicking Save will automatically open your email with the file already attached in most cases.
If you get an error message that your EndNote library is damaged, you might be able to recover the damaged library using EndNote program:
If your EndNote library has been deleted accidentally but the .Data folder remains, you may be able to recreate your EndNote library.
If your EndNote library becomes damaged, and you have tried to recover the library or recreated the .enl file but this has not fixed it, you can create a new EndNote library from the EndNote citations in your Word document: