1. Go to the File window of the ICloud-compliant application, select Open (or Save), and select the "ICloud" tab to open ICloud File Manager
2. Please note that you want to add two files to a folder (don't worry, once you are created, you can add more files to this folder)
3. Drag and drop one file to another-just like iOS and Launchpad-Create a new icloud folder from OS X's icloud browser
4. Name the icloud folder as appropriate, and use drag and drop to add more files to this icloud folder if necessary
If you want to create multiple folders, just repeat this step. To delete a icloud folder, just move all the files out of the folder and it automatically disappears-just like on iOS and Launchpad.
If you want to add a new file from the Mac to the icloud, you can do this from the "Move to icloud" menu in the window bar, or you can add files from the Mac OS X Finder and Mac desktop directly to the newly created folder in icloud's browser. Remember, however, that removing files from the icloud on OS X is a bit tricky, not obvious, and is handled from system preferences, not icloud "open" and "save" windows.
If this feels a bit cumbersome and cumbersome for you, Mac users will soon experience significantly better file management options known as icloud virtual disks on OS X Yosemite and iOS8.
The icloud virtual disk puts local icloud file management into the Finder, making it easier to manage the process from the start, including creating, adding, and deleting files for new folders. OS X Mavericks and previous versions of users can try this on their own, that is, when you flip through other mobile folders, you also allow icloud file access from the Finder to do this. While this approach is useful, it is not officially supported, so it is best to keep it to the advanced user, and the rest will not be known until the OS X Yosemite is released.