Files are not uploading to icloud, it has been loading for several hours

Hi Larionkantor

Here's a resource that will help you setup, view, and edit your iCloud Drive files on your PC: Use iCloud Drive to store documents on your Mac, iPhone, and iPad - Apple Support

Here's some information from that resource to keep in mind:

"If you can’t move or save a document to iCloud Drive

If you can’t move or save a document to iCloud Drive, your iCloud storage space may be full. The document stays on your Mac, and is uploaded to iCloud Drive when space becomes available.

iCloud Drive shares your iCloud storage with iCloud Photos, iOS and iPadOS device backups, messages and attachments in iCloud Mail (your @icloud.com email account), and more.

To get more space, do the following:

• Upgrade your storage. See Manage iCloud storage.
• Remove items you don’t need to store in iCloud Drive."

Additionally, the speed of the upload will depend on the files size as well as how good the Internet connection is. If things don't improve you may want to try a different network