I've just set up my new MacBook. I have dropbox and I use iCloud drive and all their files have uploaded to my Mac. But I can't see any of them. I can see all the folders in them, and even folders inside folders, but I can't see any actual files inside the folders. I know they're there because if I open dropbox from the dock, I can see outlined squares and file names and I can open these. How can I get my Mac to actually show me my files!