Best external SSD: Performance & Benchmark Test

Every drive listed on this page is tested on the same platform and evaluated using the same benchmarking methodology. We compare maximum read and write speeds, price per GB, interface class, and overall ranking so that you can compare all models under identical conditions.

The most important test criteria include sequential read and write speeds, large-file copy tests, sustained performance during longer transfers, and compatibility with different interfaces such as USB-C, USB 3.2, USB4, and Thunderbolt.

You can learn how the displayed score is calculated here.

The "best" external SSD depends heavily on its intended use. For backups, capacity and consistent write performance are the most important factors. For gaming, a fast and compact SSD with at least 1 TB is recommended. For video editing, sustained write speeds are more important than short peak speeds. For travel or outdoor use, the SSD should also be rugged and resistant to water and dust.

Currently, high-speed USB4 SSDs are among the best external SSDs available. For maximum performance, USB4 models from ADATA, MSI, Corsair, and SanDisk are among the market leaders.

For regular backups, office files, photos, and everyday file transfers, an external SSD with around 1,000 MB/s is more than sufficient. These models usually use USB 3.2 Gen 2 and offer the best balance of speed, price, and compatibility for most users.

If you frequently copy large files, load games from an SSD, or work with high-resolution video, you should consider an SSD capable of around 2,000 MB/s. These models typically require USB 3.2 Gen 2x2 to achieve full performance. For professional workflows involving 4K, 6K, or 8K video, USB4 or Thunderbolt 3 SSDs exceeding 3,000 MB/s can be worthwhile, although they are considerably more expensive. However, it is essential that your computer also supports the required interface.

USB4 is particularly worthwhile for an external SSD if you regularly transfer very large amounts of data and your computer also supports USB4 or Thunderbolt. USB4 SSDs can be significantly faster than conventional USB SSDs and are especially attractive for video editing, large project files, professional photography workflows, and high-speed working drives.

For simple backups, documents, photos, music, or occasional file transfers, USB4 is usually unnecessary. In these cases, a good USB 3.2 SSD with speeds between 1,000 and 2,000 MB/s is perfectly adequate. USB4 is therefore mainly beneficial for power users, content creators, and anyone who wants to save time when transferring large files. Without a compatible USB4 port on your laptop or PC, however, a USB4 SSD will provide little to no noticeable speed advantage.

The best external SSD for backups is one that offers high capacity, stable write performance, and reliable power delivery. For regular system backups, large photo or video libraries, and long-term storage, an external SSD with 2 TB, 4 TB, or more is particularly well suited. What matters most is not only maximum speed but also consistent write performance when transferring large amounts of data. Pay particular attention to the pSLC cache, as write speeds typically decrease once the fast cache is exhausted.

If you are looking for a portable backup SSD, choose a rugged model with a shock-resistant enclosure, a USB-C connector, and ideally password protection or hardware encryption.

For Mac users, an external SSD with USB-C, excellent macOS compatibility, and stable performance is essential. SSDs that can easily be formatted using APFS or exFAT and deliver high speeds over Thunderbolt or USB-C are particularly practical. For professional Mac workflows, fast USB4 or Thunderbolt SSDs are especially attractive.

For gaming, a fast external SSD with 1 TB or 2 TB of storage and speeds of around 1,000 to 2,000 MB/s is usually sufficient. It reduces loading times, provides plenty of space for large game libraries, and is significantly faster than an external HDD. For video editing, the SSD should primarily deliver high sustained write speeds, since large video files are continuously written and read over extended periods.

For simple documents, small backups, and occasional file transfers, 500 GB to 1 TB is sufficient. If you want to store photos, videos, games, or complete system backups, you should choose at least 2 TB. For content creators, photographers, video editors, and users with large media libraries, 4 TB or more is recommended, although such capacities are currently still very expensive.

As a rule of thumb, your external SSD should have at least twice the capacity of the amount of data you regularly back up. This leaves enough room for new files, multiple backup versions, and temporary working data. If you use the SSD primarily for backups, you should deliberately allow for free storage space.