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Response time when working on catalog/images on an external drive


Jul 15, 2009
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.
Sep 29, 2007
Isle of Wight, UK
Lightroom Experience
Power User
Lightroom Version
Cloud Service
The 1:1 previews are always kept next to the catalog, so that is on a per-catalog basis.

Camera raw cache is shared between all catalogs.

Is it taking that long in Library or Develop? Knowing that would help to make the right recommendations.