Rename files and folders in iCloud Drive on iCloud.com
You can change the name of files and folders in iCloud Drive.
Note: You can’t change the names of app folders, such as Pages, Numbers and Keynote.
In iCloud Drive on iCloud.com, tap Select and then select the file or folder you want to rename.
Tap , choose Details, edit the name in the Info pane and then tap Return or Enter on the keyboard.