*EndNote libraries are made up of two parts: the .enl file and the .data folder. These two parts must be kept together, both are needed for the library to work correctly.
*EndNote libraries should be kept on the computer's hard drive. Storing and editing libraries on a network drive can lead to corruption and performance issues.
*EndNote libraries should never be stored in cloud-syncing folders such as DropBox, OneDrive, SugarSync, etc. or in SharePoint. Syncing folders corrupt EndNote libraries over time.
*If needed for sharing purposes, a copy of an EndNote library can be placed in a read-only folder on a network drive for multiple users to access. The original library should remain on the owner's computer.
*References in EndNote libraries can be synchronized between desktop and laptop computers, an EndNote online library, and an iPad using *EndNote Sync. EndNote Sync is the only suggested synchronization method for EndNote references.
*EndNote libraries can be shared with other EndNote X7, X8, or X9 users through EndNote Sync and Library Sharing.