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heatherm53441278
heatherm53441278
Participating Frequently
July 13, 2026
Question

Does my latest LR catalog contain all the previews from older catalogs from which it is descended?

  • July 13, 2026
  • 4 replies
  • 41 views

A while back I wanted to make more space on an external HD and foolishly deleted 5 years worth of travel photos, thinking that I had copies elsewhere. Apparently not 🤔.
Since then I’ve relied on previews of those deleted originals, sometimes upscaling them to produce full-screen sized digital memories.
I’ve been reluctant to delete old catalogs, thinking that the current catalog references them when displaying previews of the deleted original photos.

Those old catalogs now occupy Squillagigs of drive space. 

Can I safely delete them and still be able to access all previews?

    4 replies

    Rob_Cullen
    Community Expert
    Rob_CullenCommunity Expert
    Community Expert
    July 24, 2026

    The first reply from ​@dj_paige  is correct- If you have no recourse to your originals (do you not make backups of image files?) then your only hope for recovering an semblance of your photos is to extract JPGs from the existing Previews in the library. (Using the plugin in this link)

    https://regex.info/blog/lightroom-goodies/preview-extraction

    Others simply do screen-clips from the preview images in the catalog (full-screen?).

    One catalog that is always upgraded will only ever have one previews cache (it carries forward to the upgraded catalog).

    If you ever created multiple separate catalogs, then each of these that still exist may have an accompanying Preview cache with the catalog that you can open and view.

    ps. If you ever made Smart Previews- this Smart Preview cache is also a source for recovering images.

     

    Regards. My System: Windows-11, Lightroom-Classic 15.4.1, Photoshop 27.8, ACR 18.4, Lightroom 9.4, Lr-iOS 10.4.0, Bridge 16.0.3 .
    dj_paige
    dj_paige
    Legend
    July 13, 2026

    If your latest LrC catalog upgraded your previous catalog, and you used one and only one catalog throughout the years, then your current catalog has indexed the same photos as the previous catalogs. But there are scenarios where this is not true, especially if you ever used more than one catalog.

    So you would be wise to open the old catalogs and see what is in them and if they are in your current catalog. It sounds like a lot of work, and it is, but its the only way to be 100% sure.

    Regarding your title, the catalog does NOT (and never did) contain the previews. It contains indexes to your photos. The previews are separate and these will be used when you upgraded your catalog.

    dj_paige
    dj_paige
    Legend
    July 13, 2026

    Adding: the LrC previews are irrelevant to this problem. In the case where you accidentally or intentionally deleted the previews, LrC will regenerate them as needed. It is the catalog file that is important. Either the catalog file has indexed all of your photos, or not (as described above if you might have had more than one catalog).

    heatherm53441278
    heatherm53441278Author
    Participating Frequently
    July 23, 2026

    Thank you DJ. Sorry I’ve been slow to respond.

    PS it was the originals that I deleted, not the previews. Then I used that HD for a few days until I realised what I’d done. Recovery sWare had no luck from then.

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