---
id: external-drives.what-to-check-before-buying-an-external-ssd
url: https://storagestudio.us/faq/external-drives/what-to-check-before-buying-an-external-ssd
category: "External drives"
subcategory: "Choosing a drive"
question: "What should I check before buying an external SSD for my Mac?"
alt_questions:
  - "Buying an external SSD for MacBook checklist"
  - "What to look for in a portable SSD"
  - "Best external SSD features for Mac"
  - "how to choose external ssd mac"
short_answer: "Check the connection matches your Mac's ports and comes with a good cable, enough capacity with room to grow, sustained (not just headline) speed, how it handles heat, warranty and brand, and bus power for laptops."
tags: ["buying", "ssd", "checklist"]
related: ["https://storagestudio.us/faq/external-drives/what-kind-of-external-drive-should-i-use-with-storage-studio", "https://storagestudio.us/faq/external-drives/how-big-should-my-external-drive-be", "https://storagestudio.us/faq/external-drives/are-cheap-unbranded-ssds-safe"]
applies_to: "all"
last_reviewed: 2026-10-01
---

# What should I check before buying an external SSD for my Mac?

Match the drive to your Mac and how you'll use it:

- **Connection** — USB-C or Thunderbolt that your Mac's ports support at full speed, with a good cable included.
- **Capacity** — enough for what you'll move now plus room to grow; drives slow down when nearly full.
- **Sustained speed** — reviews of large-file copies tell you more than the headline figure.
- **Heat** — metal cases that shed heat cope better with long copies.
- **Warranty and brand** — a reputable maker and seller.
- **Power** — bus-powered for laptops, so it works from the cable alone.

For Storage Studio, an SSD is recommended for anything you'll run or open daily — see [what kind of drive to use](https://storagestudio.us/faq/external-drives/what-kind-of-external-drive-should-i-use-with-storage-studio) and [how big it should be](https://storagestudio.us/faq/external-drives/how-big-should-my-external-drive-be).