Upload files to or download files from iCloud Drive on iCloud.com
You can upload files from a device to iCloud Drive. You can also download files that you want to copy from iCloud Drive to your device.
In iCloud Drive on iCloud.com, tap the File Upload button , then follow the onscreen instructions.
If you see a message that there isn’t enough free space for the items you’re trying to upload, you can delete iCloud Drive files to save space.
Some apps, like Pages, Numbers, and Keynote, have their own folders in iCloud Drive. You can only upload a file into an app’s folder if the app can open the file.
Changes you make to a downloaded file appear only on your device unless you subsequently upload the file to iCloud Drive.
In iCloud Drive on iCloud.com, tap Select, then select the files you want to download.
If you want to select all the files in the folder, tap Select All.
Tap the Download button in the iCloud Drive toolbar.