Alfasoft. Storage location for EndNote libraries. Sweden: Alfasoft, 2021. https://support.alfasoft.com/hc/en-us/articles/360001311578
The following six-minute training videos will give you a quick introduction into the basic functionality of Endnote including how to create your Endnote library, and importantly, where to save it:
You can find the full suite of EndNote online training videos at https://www.youtube.com/user/EndNoteTraining/featured.