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how to remove picture previews systemdata 816,31 GB
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If you are referring to the catalog file-type that is {Catalog name Previews.LRDATA}, then you can simply delete this one file in Finder (Drag to Trash). Do NOT trash your Catalog {.LRCAT} file!!.
Naturally Lightroom-Classic will not operate without a Previews cache, (Previews are what you see in the catalog!) so it will begin to re-build these previews as you view images in the catalog (OR you choose- MENU: Library > Previews > Build......)
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Hello
I can´t find the catalog in finder.
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Open 'Catalog Settings > General' tab and the loctaion is shown. You can even use the 'Show' button to access it directly. See attached screenshot.
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As you've tagged MacOS, you can also hold Command and click on the the title bar of the catalog, which opens a folder list. Select the folder from the list to open it.
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Hello Sean
Thanks for your answer. I can´t find the problem about the big amount of systemdata.
Could you take over my computer.
Best Regards
jorgen norgaard