Fix file issues on Mac
How to identify and fix common problems with your Mac’s all–important data files
iCloud file access
To take a look at what in your iCloud Drive folder (the cloud storage space that comes free with your Apple Account, or what you pay for with a monthly subscription) on a Mac, open a regular Finder window, and in the sidebar, click “iCloud Drive”.
Alternatively, click the Desktop to make sure Finder is to the fore, and in the menu bar, click Go > iCloud Drive.