---
id: mac-storage-basics.does-trimming-a-video-in-photos-save-space
url: https://storagestudio.us/faq/mac-storage-basics/does-trimming-a-video-in-photos-save-space
category: "Mac storage basics"
subcategory: "Creative and media apps"
question: "Does trimming a video in Photos save space?"
alt_questions:
  - "trim video photos mac space"
  - "shorten video save storage"
  - "quicktime trim video"
  - "trim video keep original photos"
  - "make video shorter mac"
  - "cut video length save space"
short_answer: "No — Photos keeps the full original so the trim can be undone. Export the trimmed clip and delete the original, or trim in QuickTime Player and save the shorter file."
tags: ["video", "photos", "trim"]
related: ["https://storagestudio.us/faq/mac-storage-basics/does-editing-photos-use-more-space", "https://storagestudio.us/faq/mac-storage-basics/how-do-i-make-a-video-file-smaller-on-a-mac"]
applies_to: "all"
last_reviewed: 2026-10-01
---

# Does trimming a video in Photos save space?

Not by itself. Photos edits are non-destructive: the trimmed version plays, but the full original is kept so you can undo the trim later. The library can even grow, because the edited version is stored too.

To genuinely save space, export the trimmed clip (**File → Export**), import the shorter file, and delete the original from Photos (then from Recently Deleted). Or trim in **QuickTime Player** with **Edit → Trim**, which saves a new, shorter file you can keep instead of the original.