CC is uploading info from my edits in the cloud, but when i open the cloud - there are no files but 6gb used? My cloud is not synced with anything, why is uploading some invisible info?

Recently i spotted that my cloud filling up (Adobe cloud). When i checked - there are no files in it. I edit everything locally - nothing gets uploaded or synced to the cloud for security.

 My question is - what info is getting uploaded? How do i know that its not my client’s photos? 6gb of no files is a lot of space, am i going run out of space because if? What exactly is this info, does it have personal details?