Rebuild Lightroom previews to save space and confirm integrity

Peter Krogh's PetaPixel piece outlines a maintenance step most photographers skip: deleting and regenerating Lightroom's preview cache. Old previews occupy gigabytes, slow the catalog, and can mask corrupted source files. A rebuild surfaces integrity issues early and trims cache size by 30 to 50 percent. For teams using Lightroom as a lightweight DAM layer, this is preventive work that pays compound returns. The signal is catalog health as a scheduled task, not a crisis response.