File Manager ‑ Custom Folders

I wish there were instructions that came with the app. It isn't very intuitive to use. You can be in a folder you made and upload a file and it doesn't automatically show up in the folder. You then need to find it in the many pages of photos that are shown below and check the box for any images you want to show up in the folder. Then click the small button in the upper right area "Add to Folder." Hopefully the developer will figure out a way to give better instructions somehow. I couldn't find any documentation for the app, but then again, I'm not sure where to go to find it. I also wish there was a way to view larger photo thumbnails and not just the list view which makes the photo too tiny to see what it is.