---
id: apps.does-a-moved-app-run-slower
url: https://storagestudio.us/faq/apps/does-a-moved-app-run-slower
category: "Apps"
subcategory: "Moving apps to your fast drive"
question: "Will an app run slower from an external drive?"
alt_questions:
  - "Is it slower to run apps from external SSD?"
  - "App launch speed external drive Mac"
  - "Performance of apps on external drive"
  - "Do moved apps open slowly?"
short_answer: "It depends on the drive. A fast SSD on USB-C or Thunderbolt usually feels close to the built-in drive; slow drives make launches slower. Move big apps you use occasionally."
tags: ["performance", "external drive"]
related: ["https://storagestudio.us/faq/apps/which-apps-should-i-move-to-an-external-drive", "https://storagestudio.us/faq/apps/why-is-an-app-marked-caveat-because-i-used-it-recently"]
applies_to: "all"
last_reviewed: 2026-10-01
---

# Will an app run slower from an external drive?

It depends on your drive and connection. A fast SSD on a USB-C or Thunderbolt port usually feels much like the built-in drive once an app is open; a slow spinning disk or an older USB connection makes launches noticeably slower.

That's why apps you open many times a day are usually better left on the built-in drive, and big apps you use occasionally are the best ones to move. Storage Studio flags recently used apps with a **Caveat** for exactly this reason.