Upload files to Disk
In the app, open the folder you want to upload a file from and tap at the bottom of the screen. You will then be asked to select a file from the device, take a new photo, or create a new folder.
You can sort the list of files and folders: tap in the upper-right corner to view the options available.
Note. You can't sync files on your phone. You can only upload and download files manually. But you can enable unlimited photo and video auto-uploads.