5953 Views 7 Replies Latest reply: Apr 24, 2008 5:31 AM by brettgross
Aperture stores thumbnails for images (they're not tiny), and it may store JPEG previews for each file, depending on how large they are.
RAW files (Aperture's bread and butter) are generally quite large, and so the JPEG previews and thumbnails are relatively small compared to the original files.
In your case, you're saying you have 1175 files which overall take up 883 MB of space. That's an average of about 750 KB per image... which sounds like low-quality JPEGs (perhaps quality Fine from a point-and-shoot camera). In that case, Aperture's previews aren't going to be any smaller than those files, and the thumbnails also won't be that much smaller. So you may see what you're seeing. Turning off previews may save you some space in the library.
But, frankly, 1.44 GB isn't that much space. Many people that use Aperture can shoot 10-20 GB of RAW photos in an hour or two.
By default, Aperture creates previews of all of your images. A preview is little more than a JPEG copy of the original. The size of these are determined by the settings in Aperture's preferences. When you're dealing with RAW images, the size of the previews are significantly smaller than the master image, but if you're working with JPEGs, then the previews can balloon the library to as large (large when you add up the thumbnails and duplicates) as the referenced files.
You can reduce the size of the previews, or delete them and turn them off all together if you're not sharing your photos with other iLife & iWork apps from Aperture. There are some other reasons you may find them beneficial, and this article will help you determine if they are right for you:
There's also the existing issue/bug where Aperture doesn't compact the library when photos are removed. And that's at the project level.
So if you've reorganized what photos are in which projects, then chances are there's wasted space there as well..
I opened a bug with Apple for this, and they've marked it as a dupe of an existing bug, so they do know about it.. No eta though unfortunately.
Your posting made me curious so I did some digging into my Library. I've been moving a lot of maters between Projects lately and I was wondering how much extra space my Library was taking up...
The short answer is that I saved 4.7GB by making Aperture rebuild all of the thumbnails.