I have the same issue. I can see the thousand photos saved, but there is no triple-button icon, only DELETE.
This is the most frustrating cloud system I have ever seen.
The Solution is to NOT USE SAMSUNG CLOUD. It's complete Garbage for doing anything other than viewing Photos on Multiple Devices.
For BACKING UP IMAGES to your PC, Download the SmartSwitch app on your PC and your Cell Phone. Then when you connect the 2 devices via USB cable, your Cell Phone will appear as a Device on your PC. You can Navigate to the DCIM folder, and Copy all your Images from There to a File Folder on your PC.
I'm having the same problem so stupid I had to take a note 9 back and swap it as power button broke and they uploaded all my stuff to Samsung cloud now cant get it back only way would be to screen shot over 3000 photos