Hi Tinen, if you don't have the .lrcat file, even a backup copy of one, then I'm afraid you'll have your images on the external drive, but all the organization and editing that you have done is most likely gone. Lightroom keeps all edits, ratings, collections, and pretty much everything else in its catalog, the aforementioned database file called "My Lightroom Catalog.lrcat" (or whatever you may have named it). At least you still have your images - you can start over from scratch and begin re-importing to a new catalog. Just for reference, Lightroom has a preference for backing up your catalog, you can have it ask you every tie LR shuts down, once a day, once a week, etc. I recommend setting this to at least remind you once a day (you can optionally ignore it). I keep my catalog backups on a folder on Google Drive, so that even in the even of a catastrophic system problem, my backup catalogs are available. I know that's no help to you now, but at least perhaps some guidance for the future. Let us know how we can help further. Mike
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