---
id: external-drives.my-external-drive-keeps-disconnecting
url: https://storagestudio.us/faq/external-drives/my-external-drive-keeps-disconnecting
category: "External drives"
subcategory: "Speed, cables and hardware"
question: "Why does my external drive keep disconnecting from my Mac?"
alt_questions:
  - "External SSD randomly ejects"
  - "fast drive disconnected notification again and again"
  - "Drive keeps unmounting Mac"
  - "external drive disconnects when Mac sleeps"
  - "Why does my drive drop off?"
  - "Disk Not Ejected Properly keeps appearing"
short_answer: "Usually a loose or poor cable, an underpowered hub or a tired port; sometimes the drive. Connect directly with the drive's own cable, try another port and run First Aid. Storage Studio pauses and resumes safely, but fix frequent drop-offs."
tags: ["disconnects", "cable", "troubleshooting"]
related: ["https://storagestudio.us/faq/external-drives/should-i-plug-the-drive-into-a-hub-or-directly", "https://storagestudio.us/faq/external-drives/does-the-cable-matter-for-an-external-ssd", "https://storagestudio.us/faq/external-drives/my-external-drive-does-not-show-up-on-my-mac"]
applies_to: "all"
last_reviewed: 2026-10-01
---

# Why does my external drive keep disconnecting from my Mac?

The usual causes are physical: a loose or low-quality cable, a hub or dock that can't supply enough power, or a port that's worn. Less often it's the drive itself, or the Mac cutting power to it during sleep.

Work through it:

1. Plug directly into the Mac with the drive's own cable.
2. Try a different port.
3. If it's bus-powered, avoid unpowered hubs.
4. Run **First Aid** on it in Disk Utility.

Storage Studio copes safely with disconnects — moves and transfers pause and resume — but frequent drop-offs are worth fixing, because whatever is open from the drive is interrupted each time.