I would also love to have a way to fix this. We are only using ~40 gb of our 100 gb cloud space limit, but you somehow use the whole 100 gb on a computer when we sync files. It means that you are storing ~60 gb of temporary files for no apparent reason. I have to delete them everyday to make sure my SSD isn't full and it is a bit annoying. I even moved the Creative Cloud file location to another HDD, but CoreSync keeps syncing temporary files on the SDD.
Here is a good example of the expected behavior for a cloud sync feature: I have synced files from OneDrive (5 gb limit) on my SSD. I only use ~500 mb on the cloud and OneDrive only uses ~500 mb of disk space, with no temporary files stored anywhere.