---
id: duplicates.why-does-it-say-the-scan-covered-only-the-first-files
url: https://storagestudio.us/faq/duplicates/why-does-it-say-the-scan-covered-only-the-first-files
category: "Duplicate files"
subcategory: "Scanning and Auto-scan"
question: "Why does the duplicate scan say it covered only part of my files?"
alt_questions:
  - "Partial view duplicates Mac"
  - "The scan covered the first candidate files"
  - "Did the duplicate finder check everything?"
  - "Duplicate scan stopped early on a large library"
  - "Why is my duplicate result marked as partial?"
short_answer: "On a very large collection, one scan covers as much as it sensibly can and says so instead of implying it checked everything. The duplicates shown are real: clean the ones you want, then scan again to cover more."
tags: ["duplicates", "partial", "large libraries"]
related: ["https://storagestudio.us/faq/duplicates/what-does-scan-now-do-in-duplicates", "https://storagestudio.us/faq/duplicates/why-does-my-cloud-duplicate-scan-say-partial-view"]
applies_to: "all"
last_reviewed: 2026-10-01
---

# Why does the duplicate scan say it covered only part of my files?

On a very large collection of files, one scan covers as much as it sensibly can and then tells you so, rather than pretending it looked at everything. The status line marks the result as partial, and hovering over it explains how much was covered.

The duplicates shown are real — clean the ones you want, then click **Scan now** again to cover more. Repeating the scan without clearing anything tends to look at the same files again, so tidying up between scans is what moves it forward.

This limit exists so a scan never uses an unreasonable amount of memory, especially on Macs with less of it.