Hi, Firefox offers two formats. I suggest creating a file in each. I also suggest creating the files on your C drive and then copying them to the USB drive. This avoids occasional performance issues when saving or opening files if Firefox tries to access a removable drive that is no longer present. Here are the articles with more details: (1) Backup Feature => JSON format This format is only useful to Firefox and is not easily human readable. It may preserve more data than the next feature I'll mention. How to: [[Restore bookmarks from backup or move them to another computer]] (2) Export Feature => HTML format This feature creates the ancient cross-browser export file commonly called bookmarks.html. You can open it in any browser to use links to all your bookmarks: How to: [[Export Firefox bookmarks to an HTML file to back up or transfer bookmarks]] Does that do what you need?