Is there a way to cache 1:1 image previews and camera raw on a per catalog basis? For example, I have a catalog of over 10,000 images on an external drive. I want to keep the cache on that drive to improve performance. Is this possible? If not, are there any tricks to improve response time when working a catalog and images stored on an external drive? Right now, it takes 5-10 s to move from one image to the next, when 1:1 image previews are not there. I can't afford to keep the preview on my local laptop with limited drive size.