---
id: data-transfers.does-copy-overwrite-files
url: https://storagestudio.us/faq/data-transfers/does-copy-overwrite-files
category: "Data Transfers"
subcategory: "Copy, Move and Sync"
question: "Does Copy overwrite files that are already at the destination?"
alt_questions:
  - "copy replaces existing files?"
  - "what happens to duplicates when copying"
  - "does a second copy transfer everything again"
  - "copy skip existing files mac"
  - "will copy duplicate files that already exist"
short_answer: "Identical files are skipped, changed files are replaced with the source's version, and nothing extra at the destination is deleted. Re-running the same Copy only sends what's new or changed."
tags: ["copy", "overwrite", "duplicates"]
related: ["https://storagestudio.us/faq/data-transfers/does-one-way-sync-delete-files", "https://storagestudio.us/faq/data-transfers/why-is-a-repeat-transfer-faster", "https://storagestudio.us/faq/data-transfers/copy-vs-move-vs-sync"]
applies_to: "all"
last_reviewed: 2026-10-01
---

# Does Copy overwrite files that are already at the destination?

Copy skips files that are already identical at the destination and replaces files whose content has changed with the source's version. It never deletes anything at the destination that isn't in the source — that's the difference from Sync (one-way).

This is also why running the same Copy again is quick: only new and changed files are sent.

If a file at the destination has the same name but you want to keep both versions, move or rename one of them before you copy.

Related: [Does Sync (one-way) delete files?](https://storagestudio.us/faq/data-transfers/does-one-way-sync-delete-files) · [Why is a re-run so fast?](https://storagestudio.us/faq/data-transfers/why-is-a-repeat-transfer-faster)