maybe what you want is covered by this plugin? https://www.lightroom-plugins.com/CacheMan.php
Jostein Den 01.07.2016 04.02, skrev Igor PDML-StR:
I have a question for LR gurus. I am trying to clean up some space on the main drive of my computer, where the LR libraries (and hence the previews) are stored. For that, I am removing 1:1 previews for those folders that are "completed" (i.e. I've done what I wanted to do, and now they are just stored without any active work). Is there an easy way to see which photos have 1:1 previews stored and whihc ones don't? I am also deleting "smart previews" for those folders. For "smart" previews, it is easy to see which photos have them. I go to a particular folder, Ctrl-A to choose all of them (on Windows), and then under the histogram panel, I see if those photos have smart previews or not. (It shows the count when multiple photos are chosen.) I do not see any way of telling if the photos have 1:1 previews. Of course, I can "delete 1:1 previews" anyway, but it is a waste of time if there are none. Thank you! Igor
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