External

Category overview

External SSDs combine fast, durable storage with a small form factor and a single cable to the host. They have replaced external HDDs as the default portable storage for users who value speed, durability and silent operation, especially in video, design and travel use cases.

What this category covers

USB 3.x external SSDs that work with most current desktops and notebooks; faster USB 3.2 Gen 2x2 drives for hosts that support 20 Gbps; and Thunderbolt 3 and Thunderbolt 4 SSDs that approach internal NVMe speeds when paired with a Thunderbolt host.

How to choose an external SSD

Match the interface to the host

The drive's rated speed only applies if the host port supports the same interface. A 20 Gbps drive on a regular USB 3.x 10 Gbps port runs at 10 Gbps. A Thunderbolt drive on a regular USB-C (Universal Serial Bus Type-C) port may not work at all or runs at a much lower rate. Verify the host port type before ordering.

Look at sustained write speed

Most external SSDs quote a peak read speed. Sustained write speed during long transfers is what matters in real workflows like video editing or backup. Some drives slow down dramatically once a small fast cache is full. Independent reviews are the best reference for sustained behaviour.

Consider build and durability

Drives meant for travel or fieldwork have rubberized cases, dust and water ratings (IP65 and similar), and shock tolerance figures. For office and travel between meetings, a basic well-built drive is enough. For active outdoor or industrial use, choose a rugged model.

Plan capacity with margin

External SSDs are commonly used for working data that grows over time. Buying one tier larger than the immediate need is often cheaper than replacing the drive a year later. SSDs also slow down when very full, so leaving headroom helps.

Key features to compare

Connector type and included cable

USB-C is the modern standard. Some drives include a USB-C to USB-A cable for compatibility with older hosts. Thunderbolt drives need a Thunderbolt-rated cable, not a generic USB-C one.

Hardware encryption

Some external SSDs include hardware-based AES encryption with a PIN entered through software or a small keypad on the drive. For carrying sensitive data, this adds meaningful protection without depending on the operating system.

Power draw

Most external SSDs are bus-powered and work without an external supply. On weak or shared USB ports, the drive may disconnect under load. Plugging directly into a host port or a powered USB hub usually fixes this.

What to check before buying

• Does the host actually support the drive's rated interface (USB 3.x, USB 3.2 Gen 2x2, Thunderbolt)?
• Is the rated sustained write speed enough for the typical workload?
• Will the drive be carried in a bag and need a rugged design?
• Does the data require hardware encryption?
• Is the included cable the right one for the most-used host port?

Frequently asked questions

Why is my external SSD slower than advertised?

The host port version is the most common cause. A 20 Gbps drive on a 10 Gbps port runs at 10 Gbps; a USB 3.x drive on a USB 2.0 port runs at 30 to 40 MB/s. The cable also matters: short, certified cables are more reliable at high speeds than long generic ones.

Can I use an external SSD for video editing?

Yes, particularly with a USB 3.2 Gen 2x2 or Thunderbolt drive. For 1080p and standard 4K editing, even USB 3.x drives work fine. For multicam or high-bitrate 4K and 8K editing, Thunderbolt SSDs are usually the right choice.

Are external SSDs better than external HDDs for backups?

For speed, durability and noise, yes. For capacity at low cost, external HDDs still win above a few terabytes. The right choice depends on the priority: SSDs for active backup of important data, HDDs for large infrequent archival backups.

How do I securely erase an external SSD?

For drives with hardware encryption, deleting the encryption key (often called secure erase or crypto-erase) renders the data unreadable instantly. For drives without hardware encryption, the manufacturer's tool or the operating system's secure erase function overwrites the drive. Standard delete commands do not securely erase SSDs.

Does an external SSD work the same on Windows and macOS?

Hardware-wise, yes. The factory file system is often exFAT for cross-platform compatibility. For best performance on a single platform, reformatting to that platform's native file system (NTFS for Windows, APFS for macOS) is straightforward.