Add or remove shared folders and files in iCloud Drive
After you share a folder, you can add folders and files to it and all participants can access them. If you remove a folder or file from a shared folder, all participants lose access to the item. All participants who can change the files can also add and remove folders and files.
Add a folder or file to a shared folder in iCloud Drive
On your Mac, click the Finder icon in the Dock to open a Finder window, then click iCloud Drive in the sidebar.
Find the shared folder in iCloud Drive, then drag the item into the folder.
When you place a file that you already shared with others into a shared folder, only the participants of the shared folder can access the file. Participants that previously had access to the file lose it. You can also move a shared item that you don’t own into a shared folder.
Remove a folder or file from a shared folder in iCloud Drive
On your Mac, click the Finder icon in the Dock to open a Finder window, then click iCloud Drive in the sidebar.
Find the shared folder in iCloud Drive, then drag the item out of the folder.
All the participants of the shared folder lose access to the item.