My Cloud app to work like regular desktop or mobile app

It would be great if you could browse through the app like you can with the mobile app and be able to preview your files. With my mac in the finder I can hit the space bar and a preview of whatever is selected will pop up. It would make it much easier to find images I’m looking for rather than trying to find them by their small thumbnails. It’s aggravating to have to download the image before I can see what it is because some of my files are rather large and waiting until they download only to find the wrong image before me is time consuming.