.LRDB File Extension
Adobe Lightroom Database
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What is an LRDB file?
Data file created by Adobe Lightroom version 1, the first installment of the photo management application; stores information about a collection of images that have been imported into the software; enables storage of organized photo data.
Later versions of Lightroom use .LRCAT files for photo catalog information.
NOTE: Lightroom was formerly known as Photoshop Lightroom.