How can I rename files and folders in the Koofr web app?

You can rename a file/folder by right-clicking on the file/folder and clicking the Rename option or by clicking on the pencil icon that appears if you hover across the file/folder that you want to rename. When you click Rename a text box appears. Type in a new name of the file/folder and click Rename.

Also see how you can rename a file/folder in the Koofr mobile apps.