When you created an EndNote library, two components were actually created. One is the EndNote library, which is the .enl file; the other is the accompanying .data folder. Please make sure that the accompanying data folder is kept in the same directory of the .enl file. Do not lose that folder, as all the structural information, fulltext articles, full size images, and other attached materials are and will be kept in that data folder.
If you want to transport the library, in order to transport both components, you need to compress your library. To compress an EndNote library, please follow the steps below:
The following screen shot illustrates how to compress an EndNote library: