Hello!
Have you tried bookmark manager? What version of the browser are you using?
Click ⋮ Menu (three dots) in the top-right corner and select Bookmarks ▸ Bookmark manager. You can move your bookmark folders and re-arrange them.
Also, in Bookmarks manager, you can click ⋮ Menu (three dots) ▸ Import, and export your bookmarks.
Please, let me know if that helped.