Bottom Line: It is 100% safe to delete .lrdata preview folders (like Catalog Previews.lrdata or Smart Previews.lrdata). Deleting preview caches will NOT delete your original RAW photos or Lightroom editing catalogs (.lrcat).
What are Lightroom .lrdata Preview Folders?
Located next to your Adobe Lightroom Catalog (e.g. C:\Users\Username\Pictures\Lightroom\Catalog Previews.lrdata), these folders store pre-rendered image thumbnails and 1:1 zoom previews for Adobe Lightroom Classic.
When importing thousands of RAW camera photos, Lightroom generates JPEG preview tiles for every photo so scrolling through your Library module is fast. Over years of photography, preview cache files easily reach 20 GB to 60 GB+.
Can You Delete Previews.lrdata?
✅ Yes, it is completely safe to delete.
- RAW photos remain 100% untouched: Your original
.CR2,.NEF,.ARW, or.DNGcamera files live safely in their original folders. - Editing history safe: Your photo edits, star ratings, and keywords are saved inside the
.lrcatcatalog database file, not in the preview folder. - Auto-rebuilt: When you view a photo in Lightroom later, it will simply render a fresh preview.
How to Safely Clean Up Lightroom Previews
Method 1: Delete Preview Folders via File Explorer / Finder
- Close Adobe Lightroom.
- Open your Lightroom Catalog folder (
Pictures/Lightroom). - Delete the
[Catalog Name] Previews.lrdatafolder. - Relaunch Lightroom.
Method 2: Set Automatic Preview Expiration inside Lightroom
- Open Lightroom Classic.
- Go to Edit > Catalog Settings (or Lightroom Classic > Catalog Settings on Mac).
- Click the File Handling tab.
- Set Automatically Discard 1:1 Previews to After 30 Days or After 1 Week.
Related Guides
- Learn about deleting Photoshop Scratch Disks.
- How to clean up Adobe Media Cache.
- Check if you can clean Premiere Pro Scratch Disks.
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