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Aperture 3.0 referenced masters of 16K photos/104GB on external HD. In library, previews are 21GB & thumbnails 13GB. Best way to make those smaller?

202 Views 1 Reply Latest reply: May 22, 2013 2:56 PM by William Lloyd RSS
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May 22, 2013 2:31 PM

The more I read in the community, the more confused I get.  I've got my masters backup'd to another HD & the cloud.  Was going to backup the library expecting it to be pretty small and saw preview & thumbnail folders are relatively large.  Have read a good way to do it is move both folders somewhere else (as a backup) then restart Aperture to rebuild. I've also read that they sometimes come back distorted.  I know the gurus on here hate when you tinker inside the library.  I've deleted a lot of pictures using file > delete original image and all versions to get them out of the masters, but I don't think they leave the previews or thumbnails.  What is the best way to clean it up and/or reduce the size?  Thanks in advance.

MacBook Pro, Mac OS X (10.7.5)


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