Q. Can I store my EndNote database in cloud-based storage like Dropbox so I can access it from multiple devices?

EndNote isn't recommended for use with cloud storage services like Dropbox, SharePoint, Box Sync, Google Drive, Mega or iCloud.

The synchronisation process used by cloud storage can easily corrupt the files in your EndNote library.

Use them to safely store a backup copy of your compressed EndNote library instead.

See advice from EndNote support, Clarivate, regarding the use of cloud storage for EndNote.