# Is it safe to delete Lightroom Classic Previews.lrdata?

- URL: https://moreroom.app/folders/lightroom-previews
- Item: Lightroom Classic previews
- Location: `~/Pictures/Lightroom` (items inside)
- Verdict: Safe to remove — Rebuilt or re-downloaded automatically when needed.
- Comes back on its own: yes
- Source: MoreRoom rules catalogue (2026-10-17), by Yando Pte. Ltd.

## What is it?

The “Previews.lrdata” package next to a Lightroom Classic catalog stores the thumbnails, standard and 1:1 previews shown in the Library module. On large catalogs it often reaches tens of GB, especially when 1:1 previews are kept.

## What happens if you delete it?

Lightroom rebuilds previews as you browse, so the grid and loupe view are slower for a while. Photos, edits, keywords and collections live in the .lrcat catalog and are not affected.

## How to remove it properly

Choose Library › Previews › Discard 1:1 Previews, and set Lightroom Classic › Catalog Settings › File Handling › Automatically Discard 1:1 Previews to a shorter period. Or quit Lightroom and move the Previews.lrdata package to the Trash.

## Before you delete it

Remove only the Previews.lrdata package, never the .lrcat catalog file beside it.