Hello, Mroksalmarer513,
Thanks for using Apple Support Communities, it's great to have you here. We want to help you get all of your files transferred to your computer seamlessly. Based on your post, it looks like you're using a MacBook Pro, is that right? If so, then the process of transferring those files should be pretty seamless. Just to make sure all of our bases are covered, have you followed all of the steps in the article below to set up iCloud Drive on your Mac? This will guarantee that you are in a good position to transfer those files easily: Set up iCloud Drive on all your devices - Apple Support
If that doesn't seem to be working, another good option would be seeing if you can download the files directly from the iCloud website by following the steps here: Upload and download files from iCloud Drive on iCloud.com - Apple Support. This is basically an alternative way to download those items so by trying that, you may be able to get that data transferred over in the meantime while we figure out what might be causing it.
We hope that this information is helpful.
Have a great day!