Workspace Owners and account Administrators can see the file and folder properties of a workspace. Navigate to the 'Files' section of your workspace and click the 'Show folder properties' link.
To see the properties of an individual folder, click on the folder and then the 'Show folder properties' link.
A pop up will appear that summarises the contents of the workspace or folder that has been selected. It will also list the contents and size of any subfolders individually.