Can you delete the raw file copies created in c/users/name/appdata/local/adobe/camera raw/cache folder, as my c drive in starting to fill up
...........Clff, Dublin, ireland
You can control both the size and location of the ACR cache in the File Handling tab of your Preferences. The default size is set to 1gb, the maximum size can be set to 200gb. You can also put the cache on a different drive (assuming you have one available). And on that Preferences tab you will also see the option to "Purge Cache", i.e. empty the contents.