How to be sure i am backing up (syncing) to icloud

Good day to you sfr91,

Your profile shows that we’re working with a Windows computer, but your post is in an iCloud on iOS community. Could you clarify for us which device you’re attempting to sync documents from? We ask this because adding the Desktop and Documents files is something you do from a Mac computer and that process is laid out here - Add your Desktop and Documents files to iCloud Drive

If you are syncing files from an iOS device, they would be placed in the Files app on your iOS device and then synced and viewable in the Files app on the iCloud website. 

If you are attempting to add files to iCloud Drive from your Windows computer to sync, let’s be sure everything is set up correctly - Set up iCloud Drive on your Windows computer

Set up iCloud Drive

1. On your Windows computer, open iCloud for Windows.

2. Select iCloud Drive, then click Apply.

Files under 1 MB are downloaded automatically. You can open and view downloaded files directly on your computer.

Note: If you’re using iCloud for Windows version 7, the entire contents of iCloud Drive are downloaded automatically.

View, add, or remove iCloud Drive files in iCloud for Windows

Download and view files

1. On your Windows computer, open File Explorer or Windows Explorer, then click iCloud Drive in the Navigation pane.

2. Locate and double-click any file you want to open. You can only open a file that is downloaded on your computer.

The icon next to an item’s filename indicates the download status. See a list of icons and what they mean. You can also pin a file or folder to keep it downloaded to your device.

If you can’t open a file, it might have been created using an app you don’t have on your computer.

Note: In iCloud for Windows version 7, all files in iCloud Drive are automatically downloaded to your computer.

Add files to iCloud Drive

1. On your Windows computer, open File Explorer or Windows Explorer, then click iCloud Drive in the Navigation pane.

2. Drag files to iCloud Drive.

You can access these files on all your devices that have iCloud Drive turned on. See Set up iCloud Drive on all your devices in the iCloud User Guide.

Note: 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.

Thanks.