The Best Portable External SSDs

The T9 is the safest bet in the category because it holds its speed. Plenty of drives post a big number on a short benchmark and then sag once the cache fills. Tom's Hardware measured sustained sequential reads of 1,971 MB/s and writes of 1,887 MB/s using CrystalDiskMark 8 — essentially the rated speed, not a spike. Samsung credits its Dynamic Thermal Guard system, and PCMag singled out thermal management under sustained workloads when it made the T9 an Editors' Choice.

Pick it up and the appeal is obvious. The shell is a soft rubberized coat over metal, so it doesn't skate off a desk or a camera cart, and it's small enough to disappear into a coat pocket. Owners regularly describe throwing it in a bag for months without babying it. It's rated IP65, which means dust-tight and fine with a hose-down or a rained-on walk to the car.

You need a USB 3.2 Gen 2x2 port to see the full 2,000 MB/s, and that's the fine print worth reading twice. Most Macs don't have one — owner feedback on this point is loud and consistent. On a standard 10Gbps port you'll still get roughly 1,000 MB/s, which is quick, but it's half the headline. Check your laptop's port spec before you decide the T9 is worth it over a cheaper 10Gbps drive.

Samsung's Magician software handles firmware updates, drive health monitoring and password protection with encryption, and it runs on both Windows and macOS. That matters more than it sounds. Firmware updates are how storage bugs get fixed, and a drive from a company that keeps shipping them is a drive that ages better. Samsung makes its own NAND and controllers, which is part of why its firmware support tends to outlast the smaller brands.

Flaws but not dealbreakers

The 2,000 MB/s rating is conditional. On a Mac, or any machine without a 20Gbps port, you're buying speed you can't use, and a 10Gbps drive would serve you just as well for less. Owners who skipped that check are the main source of disappointment with this drive.

It gets warm during long writes. Not alarming, and the thermal design clearly works, but if you're dumping hundreds of gigabytes you'll notice the shell heating up. Leave it on a hard surface rather than buried in a bag.

It's genuinely tiny. At roughly 2.6 by 2 inches and under an ounce and a half, the X10 Pro is meaningfully smaller than the T9, and owners who've owned both say so first. For a photographer clipping a drive to a bag strap or a student who wants a backup that lives in a laptop sleeve, that size difference is the whole argument.

The speed rating is real, with the same port caveat as the T9. Crucial rates it at 2,100 MB/s read and 2,000 MB/s write over USB 3.2 Gen 2x2, and owners with a matching 20Gbps port describe multi-gigabyte transfers finishing in seconds. On a plain 10Gbps port it settles near 1,000 MB/s. StorageReview's testing of the related X9 Pro landed within 5% of its rated spec, which suggests Crucial's numbers are honest rather than optimistic.

Compatibility is unusually broad. It works over USB-C and USB-A with Windows, macOS, Linux, Chromebooks, Android, iPad Pro, PS4, PS5 and Xbox — so if you want one drive that moves between a work laptop, a console and a tablet, this covers more of that list than most. There's a lanyard loop, an activity light, and password protection built in, plus trial subscriptions to Mylio Photos and Acronis True Image.

It's IP55 rated and drop resistant to about 7.5 feet. That's a step below the T9's IP65 — think splashes and dust rather than a proper soaking — but it's plenty for a bag that gets rained on. For field work, the drop rating matters more than the water rating anyway, and 7.5 feet covers most real accidents.

Flaws but not dealbreakers

Owner feedback on the X10 Pro is more mixed than on our top pick, with a noticeable cluster of reports about drives failing or becoming unreadable after some months of use. Most owners have no trouble at all, but the pattern is real enough that we'd back this drive up rather than treat it as a single copy of anything important.

Some owners with the largest capacities report speeds below the advertised figure, and a few describe capacity limits when recording directly from a camera. If you plan to shoot straight to the drive, check your camera's maximum supported drive size first.

Crucial's customer support draws more complaints than the drive itself. If something goes wrong, expect the process to take some patience.

Most people don't need 2,000 MB/s. If your job is backing up a laptop, keeping a photo library on hand, or streaming stored video, the One Touch's 1,030 MB/s finishes those tasks fast enough that you're waiting on your own attention span rather than the drive. Tom's Hardware puts a 50GB 4K file at under 30 seconds on a fast drive versus six or seven minutes on a portable USB 3.0 hard drive — the One Touch lands much closer to the fast end than the slow one.

The bundled extras are worth more than they usually are. You get a Mylio Photos+ subscription, a Dropbox Backup plan trial, and — the useful one — Seagate's Rescue Data Recovery Services alongside a three-year limited warranty. Rescue means that if the drive dies with your only copy of something on it, there's an actual recovery path rather than a shrug. PCMag's price tracking has consistently placed the One Touch at the low end of cost per gigabyte among major brands.

The design is a nice change from the usual black slab. It's a small silver rectangle with a woven textile top, about the size of a business card and light enough that you forget it's in a bag. There's no rugged rating here, so it's not a field drive, but for commuting between a desk and a couch it's fine.

It works across Windows and macOS out of the box and connects over USB-C, with the speed you'd expect from a standard 10Gbps port on any reasonably current computer. There's no 20Gbps requirement to worry about, which is quietly an advantage — you get the full rated speed on almost any machine you plug it into.

Flaws but not dealbreakers

There's no IP rating and no drop rating, so this isn't the drive for a job site or a beach shoot. Treat it as a desk-and-bag drive.

A handful of owners report drives that wouldn't be recognized by laptops or a PS5 at all. Test yours with your actual devices as soon as it arrives, while returning it is still easy.

At half the peak speed of our top pick, it'll feel slow if you're regularly moving hundreds of gigabytes of video. That's the trade you're making.

This is the drive for people whose time is measured in render minutes. Macworld measured 2,800 MB/s sequential reads over Thunderbolt 3, fast enough to edit ProRes RAW directly off the drive rather than copying to internal storage first. Owners running Lightroom catalogs with six figures' worth of images describe the same thing: the external stops being a bottleneck and starts behaving like part of the machine.

The IP67 rating is the real separator here. Dust-tight and rated for temporary immersion, in a milled aluminum body with no seams to pry open. Nothing else in this guide is sealed to that standard. If you shoot outdoors — dust, spray, weather that arrives without asking — this is the drive that keeps working when the others are a warranty claim.

It's bus-powered and driver-free on macOS, Windows, Linux, Chrome OS and iPadOS, so there's no adapter brick and no software install. That's a bigger deal on location than it sounds. One cable, and it mounts. Owners using it as a boot drive on Macs report it starting the machine about as fast as the internal SSD does.

Fall back to a USB-C port and you get 10Gb/s, or about 1,250 MB/s — still respectable, but a fraction of what you paid for. This drive only makes financial sense with an actual Thunderbolt port on the other end. Check the little lightning bolt icon next to your USB-C port before you commit.

Flaws but not dealbreakers

It's the most expensive drive here by a wide margin, and the price only earns itself on a Thunderbolt machine. On a standard USB-C laptop, our top pick is faster and costs far less.

It's bigger and heavier than the pocket drives in this guide — about 8.3 ounces and closer to a deck of cards than a credit card. That's the cost of the sealed metal body.

Some owners note that OWC's software for working across Mac and Windows formats is a separate paid purchase, which isn't obvious from the listing.

The chassis is the point. It's a single piece of forged aluminum that pulls heat off the drive, which is why owners report transferring 500GB in one go without the throughput collapsing partway through. Add a 3-meter drop rating, IP65 dust and water resistance, and a carabiner loop, and you have a drive designed to hang off a camera bag rather than sit on a desk.

SanDisk rates it at 2,000 MB/s read and write, with the familiar caveat: you need a 20Gbps port to get there. Owners on standard ports describe roughly 900–920 MB/s in Blackmagic's speed test, which is enough for editing 2K in most codecs and workable for 4K RAW in a pinch. PCMag independently validated SanDisk's certification claims, including a 3-meter drop and 72 hours of salt-water immersion.

Reliability is the reason this isn't a higher pick. Owner feedback includes a meaningful number of drives that stopped mounting after several months, with macOS users describing particular trouble recovering data from a failed unit. The majority of owners have no issues, and the ones who don't are enthusiastic. But this is a drive we'd want a second copy of anything important on.

Password protection with 256-bit AES hardware encryption is included, and it's implemented on the drive itself rather than in software. That's the version worth having — the key never sits on your computer, so a stolen drive is a brick to whoever took it. SanDisk's Memory Zone app handles file management and space cleanup if you want it.

Flaws but not dealbreakers

The failure reports are the headline flaw. They're a minority, but they cluster around drives that were fine for months and then simply weren't, which is the worst way for storage to fail. Don't make this your only copy.

It's longer than the other pocket drives at about 4.4 inches, so it's more of a bag drive than a jeans-pocket drive.

The listing is for an older model of the Extreme Pro line, so you may be buying a generation behind the current retail version.