Backblaze will backup all your photos, no matter their size or the size of the Aperture, iPhoto and Lightroom libraries. Aperture, iPhoto and Lightroom store each photo in a packaged folder which you can see by right clicking (Control clicking) the library and select "Show Package Contents". Backblaze sees into each of these packages and backs up the individual photos. When restoring your iPhoto Library from Backblaze, your total Library file size may appear smaller. That is because Backblaze doesn't restore the iPhoto thumbnail views or cache. iPhoto will recreate those files for you when you import your restored photos.
Have more questions? Submit a request