thank you for yor hint. I actually do not want to cancel my CC subscription. I just want to know, what happens to "Document Cloud Files", IF he CC subscription is canceled. The files are no more available. That seems to be one difference between "Document Cloud" and "Creative Cloud". Am I right?
After cancellation, your allowed cloud storage is reduced to 2 GB. If you are over your storage limit, you have 30 days to reduce your online usage. After 30 days, you could lose access to some or all of your files saved on the Creative Cloud servers. To learn about your storage, see How do I know how much storage I've used?