To find the best USB flash drive of 2020 we bought 17 models and directly tested and compared their data transfer speeds. Despite the increasing prevalence of cloud storage, USB flash drives still offer the most reliable way to keep a stack of files available to you at all times. We tested every aspect of these drives, measuring their speed in transferring large files and folders containing lots of small files, their ability to play movies without lagging, their overall durability, and their portability. Whether you want to physically back up important files, a way to carry your movie collection with you as you travel, or a drive fast enough for media editing, we can help you find the perfect one.
The Best USB Flash Drives of 2020
In our opinion, the SanDisk Extreme Go 64GB provides the perfect balance of performance and price. It was one of the fastest drives in our tests, whether transferring a single large file or a large folder containing many small files. Case in point: we wrote a 5GB folder stuffed with thousands of small files to this drive in just 7 minutes, which was more than double the average speed. It is even faster when it comes to large media files — it wrote a 5GB HD movie in only 31 seconds. Despite this expediency, the Extreme Go 64GB is much less expensive than many of the premium drives on the market. The plastic construction feels relatively sturdy, and a smooth sliding mechanism retracts the connector when not in use. Though not particularly small, the body is slim enough that it won't block adjacent ports while in use — we were able to plug in a beefy headphone cable right next to the drive.
While not expensive, you do pay a bit extra for the Extreme Go 64GB's speed. That extra cost may not be worth it if you rarely find yourself transferring more than a gigabyte of data at a time. The drive itself is slightly on the larger side, just enough that it may feel a bit bulky if kept on a keychain. Plus, though the plastic construction feels sturdier than most, we're not sure how long it would stand up to daily life on a keychain. Overall, the Extreme Go 64GB is a fantastic drive that we think will serve almost anyone well, particularly if you regularly find yourself transferring multiple gigabytes of data at a time.
The risks in opting for a cheaper drive are file transfers that unexpectedly grind to a halt and take hours, or that even fail halfway through. Of all the lower-priced models we tested, the PNY Turbo 64GB provided the most reliable, if somewhat slow, file transfers. It also has a protective cover that slides over the USB connector, a feature lacking in many of the other budget options on the market.
The clear downside of the PNY Turbo 64GB is its lack of speed. It took this drive a whopping 51 minutes to write our 5GB test folder filled with small files. It was a bit faster in writing a single 5GB video file, taking just over 3 minutes, but that was still a bit behind the pack. Suffice it to say, this drive isn't for people who regularly transfer large amounts of data via flash drives. However, if you just want a drive that you know will work for the odd times that you need it, and that doesn't cost too much, the PNY Turbo 64GB is a good choice.
The classic SanDisk Cruzer CZ36 128GB is the best option we've found for those that are looking for a lot of digital storage on the cheap. In many instances, this drive costs half as much as other models of the same capacity. Perhaps most importantly, it provided consistent and reliable performance in our testing. We've run into many budget drives that tend to fail in the middle of long file transfers, but the Cruzer CZ36 128BG completed every task we asked of it — even if it took a little longer than some other models. The USB connector retracts and clicks solidly into place when extended, making it easy to slide into ports.
The biggest downside to the Cruzer CZ36 128BG is its speed — of the drives that receive our stamp of approval, it is one of the slowest. When we wrote a 5GB folder of many small files to this drive — the biggest speed challenge for any drive — it took 15 minutes to complete the transfer. While certainly not blazing, this speed is still tolerable for occasional file backups, making this a great choice for those that want to increase the redundancy of their important files without spending much.
The need for a flash drive can arise suddenly, and the best way to make sure you always have one on your person is to affix one to your keychain. The Samsung Bar Plus 128GB fills this niche almost perfectly. The all-metal construction is nearly indestructible, and the relatively sleek design allows it to nestle onto even crowded keyrings, but is long enough that you can still insert it into a USB port without removing it from said keyring. It also provides good overall speed, meaning you can snag that movie or folder full of photos quickly (in our tests it wrote a 5GB folder with lots of small files in less than 4 minutes). Its read speeds are particularly impressive, meaning you can quickly access files stored on the drive. This makes the Samsung Bar Plus 128GB the perfect receptacle for files that you don't want taking up space on your laptop's hard drive, but that you may need to access at a moment's notice.
Our biggest qualm with the Samsung Bar Plus 128GB is the hump on the back of the drive where the keyring is attached. While these extra curves lend the drive even more of a space-age feel, they also make it a bit bulkier and less sleek than some other keychain-oriented models. However, the speed and performance of the Samsung Bar Plus 128GB so far outstrips that of its competitors that it still easily gets our top recommendation for those that like to permanently attach a USB flash drive to their keychain.
If you're constantly transferring large media files or gigantic data sets between computers, or need a flash drive that is fast enough to allow you to edit photos and videos without moving them onto your computer, the PNY Pro Elite 256GB will be your new best friend. This drive is insanely fast — it wrote our 5GB speed torture test folder in just 2 minutes — a mere fraction of what it took most drives to accomplish the same. It also gobbled up a 5GB movie file in only 20 seconds — and the read speeds are even faster! It backs this blazing speed up with a stylish and durable all-metal build. In fact, it is one of the few full-sized flash drives that we are confident could survive the wear and tear of living on a keychain.
The PNY Pro Elite 256GB is considerably more expensive than most flash drives on the market. However, if you're one that constantly moves large files around the extra speed it affords will be well worth the extra cost.
With many popular laptops and most newer Android phones making the leap to USB-C, having a flash drive that can talk to this new port, as well as the still more common USB-A, can be incredibly convenient. While many drives attempt to deliver this dual functionality, the SanDisk Ultra Dual Drive is the only one we've found that really hits the mark. This drive manages to stay relatively slim while still allowing both of its connectors to be retracted at once, utilizing a smooth mechanism to do so. If you use the drive with a phone SanDisk provides a convenient app that allows you to do manual backups by specific file type. Overall, the Ultra Dual Drive is much faster than other Type-A/Type-C drives that we've tested.
While this drive provides at least average speeds for most file transfers, it can sometimes get bogged down when writing a lot of small files — it took 26 minutes to write our 5GB small file testing folder. We also found the lanyard attachment annoying. It sits in the center of the drive body, is too small for a keyring, and requires the skills of a master seamstress to thread. Despite these small drawbacks, we still think the SanDisk Ultra Dual Drive is the best option available for those that want both USB Type-A and Type-C connectivity.
Is your iPhone's memory clogged with thousands of photos? The SanDisk iXpand 128GB is the best iPhone-compatible drive we've found, offering a quick and easy way to backup any files on your phone, wherever you happen to be. The SanDisk app allows you to easily select which files you want to download from or upload to your phone, and to perform quick photo backups. Most USB/lightning drives that we've tested provide near glacial speeds, but the iXpand 128GB provides quite impressive speeds when using its USB connection. In our tests it wrote a 5GB folder full of small files --the most difficult of our speed tests-- in just over 6 minutes, putting it in the top 10%.
The biggest disappointment with the iXpand 128GB is that speeds are about halved when switching from the USB to the lightning connector, meaning it can take 15 minutes or more to backup 5GB's worth of photos. Also, the flexible rubber/plastic connection between the two connectors must be flexed in order to plug the drive into an iPhone, and it feels like that connection could wear out over time. Overall, we think the SanDisk iXpand 128GB offers the best combination of performance, convenience, and price for anyone that wants a drive for transferring files to and from their iPhone.
Super slim thumbnail-style drives are often stowed away in the smallest organizing pockets of computer bags, just in case, or semi-permanently plugged into laptops in order to expand their storage without adding a bulky extra appendage. However you plan to use a thumbnail-style drive, the Samsung Fit Plus 128GB is sure to please. Despite its small stature it was one of the fastest drives we tested, writing our 5GB testing folder in less than 4 minutes. Perhaps more importantly, its read speeds are phenomenal — it read that same folder in a mere 41 seconds. This makes it the perfect tiny drive to use as a secondary storage drive for your laptop, allowing you to access all of its files with nary a lag. Plus, it provides all this impressive performance at a relatively average price.
The one thing we wish was slightly different about the Samsung Fit Plus 128GB is the keychain attachment point. It is slim enough that most keyrings get clamped down, forcing the drive to sit at a 90˚ angle. This both negates the small footprint of this drive, and makes it very difficult to use without removing from the keyring. A lanyard would help fix this problem, but we found even thin lanyards a bit difficult to thread. We wish it was easier to attach this drive to something, as its small size makes it easy to lose. Still, for those that are fans of the extreme portability of super tiny thumbnail-styles, the Samsung Fit Plus 128GB is the best option we've found.
The Kingston DataTraveler SE9 G2 64GB is one of the slimmest and most durable drives around, making it a perfect keychain accessory for those that want to make sure they always have a flash drive available. It also delivers reasonable speeds when transferring large files — in our tests it wrote a 5GB movie file in under 2 minutes. This makes it a great and super portable option for backing up and transferring large media files.
The Kingston DataTraveler SE9 G2 64GB weakness is transferring small files, which tend to bog it down — it took the drive more than 40 minutes to write our test 5GB folder filled with small files. If you want a super portable drive for creating backups of folders full of photos, word documents, and spreadsheets, the DataTraveler SE9 G2 64GB might keep you waiting for a while. Despite that, it's one of the most convenient flash drives to carry on a keychain, and when the need arises a somewhat slow drive is still much better than no drive.
The SanDisk Ultra Fit CZ43 256GB is a classic thumbnail-style drive that offers good write/read speeds in a very small package. Though not the fastest thumbnail-style model we've tested, we found its speeds acceptable enough for working with both large media files and folders filled with word documents and spreadsheets. Perhaps most importantly its read speeds are quite good, so you shouldn't notice any lagging if you leave it plugged into your laptop all day as secondary storage for important files.
Our least favorite aspect of using the Ultra Fit CZ43 256GB is taking it out of USB ports. It fits quite snugly, and the small and somewhat slick plastic body provides little purchase. The lanyard attachment slot is also too small to accommodate most keyrings. Still, the ScanDisk Ultra Fit CZ43 256GB provides a good overall experience for those seeking a super small thumbnail-style flash drive.
If you're looking for a classic flash drive with a more durable metal body, the Kingston DataTraveler Elite G2 64GB may be for you. Sporting a familiar design with upgraded materials, it feels better suited to stand the test of time than the more common plastic fare. It also displayed great large-file speeds in our tests — it wrote our 5GB test movie file in just 47 seconds — making it a great device for backing up or transferring large media files.
Like many drives we tested, the Kingston DataTraveler Elite G2 64GB got bogged down when transferring large folders filled with lots of smaller files. Our 5GB small file tester folders took over 26 minutes to be written to the Kingston DataTraveler Elite G2 64GB, much slower than what we would consider the average mark. We also don't like the plastic cap that protects the USB connector, which feels flimsy when compared to the rest of the drive and is easy to lose. Still, the Kingston DataTraveler Elite G2 64GB is a fairly rugged and dependable drive, particularly when working with larger files.
Why You Should Trust Us
Lead author and tester Max Mutter is no stranger to USB flash drive facilitated data transfer. In his years as a nomadic ecologist he carried giant data sets stored on multiple flash drives between different remote research stations. At these stations he often constructed intricate spatial statistical models using that data on outdated computers — a tenuous situation where a slow flash drive can grind everything to a halt. Spending weeks or months in remote locales like these far from the reaches of the internet turns a flash drive full of your favorite movies into an essential commodity, and one that Max meticulously curated. In the last few years as a Senior Editor for GearLab Max has transferred and edited terabytes of testing footage from camera drones, security cameras, and dash cams using a multitude of flash drives.
To start this review we researched over 100 USB flash drives before purchasing the most promising. We then ran a plethora of real-world speed tests using large media files, folders full of songs and photos, and folders stuffed with word documents and spreadsheets. We also spent time assessing each drive's construction, determining how well they would stand up to wear and tear, and evaluating the quality of any sliding mechanisms or swivels present. In the end we whittled the list down to only the top drives we would recommend for a variety of specific use cases.
Analysis and Test Results
Most of our testing of USB flash drives focused on write and read (upload and download) speeds. Our three tests utilized different file types and sizes to assess speed. We also ranked the overall user-friendliness of each drive, meticulously evaluating their construction, how well they fit on a keychain, and how easily they slide into and out of USB ports.
We conducted three separate speed tests: a large file transfer test, a small file transfer test, and a video streaming test.
Large File Speed
Flash drives are often used to back up or transfer movie or music collections. We tested each drive's speed in transferring these larger files by writing (saving to the drive) and reading (transferring from the drive) a 5 gigabyte (GB) HD movie file with each drive, timing the process. From there we were able to calculate the exact upload and download speed in megabytes per second (MB/s). Large individual files are generally the easiest for drives to transfer, so these speeds represent the best you can expect from each drive.
The PNY Pro Elite 256GB was the clear winner in our large file speed tests, posting field-leading write and read speeds of 249 MB/s and 415 MB/s, respectively. The SanDisk Extreme GO CZ800 64GB was the only model that could get close to the PNY Pro Elite's write speeds, hitting a pace of 161 MB/s. However, its write speeds were about half as fast at 208 MB/s.
Though the Samsung Fit Plus 128GB displayed average write speeds in our large file test (70 MB/s), it showed impressive experience in reading with an average rate of 356 MB/s. The Samsung Bar Plus 128 GB offered similarly fast read speeds, making both models great and portable options for storing movie collections.
Small File Speeds
Folders full of photos, spreadsheets, or word documents are also common fodder for flash drives. Reading and writing lots of small files is a much different task than doing so with large files, so we tested this ability separately. To do so we constructed a 5GB folder jam-packed with a mix of photos, some songs, and lots of spreadsheets and word documents, and timed transferring that folder to and from each flash drive. Transferring thousands of small files at once can bog down even the best of flash drives, so the results of this torture test are likely the worst speeds you can expect from each drive.
The PNY Pro Elite 256GB again dominated our small file transfer tests writing at an average of 37 MB/s and reading at 133 MB/s. Both Samsung models also stood out in this test, achieving write speeds in the mid 20's and read speeds in excess of 100 MB/s.
Though falling short of an elite performance, the ScanDisk Extreme GO CZ800 64GB hit well above average speeds in this test, achieving 12 MB/s write speeds and 77 MB/s read speeds.
This is a pass/fail test. If we could plug a drive into a computer and watch a full 1080p HD movie stored on the drive without any lagging or dropped frames, the drive passed. This is a vital ability for those that like to keep their movie collection stored on a flash drive but don't want to have to download those movies to their computer every time an opportunity for movie night arises.
Luckily the vast majority of the models we tested easily passed, allowing us to watch and even fast forward an HD movie with no lagging. The only model that flat out failed this test was the Kingston DataTraveler SE9 G2 64GB It consistently froze and dropped frames when we tried to watch an HD movie. The PNY Turbo technically passed this test, but it does take 10-15 seconds before it will actually start displaying a movie file. Once that initial lag elapses, however, it is flawless.
Ease of Use
We spent days using each one of our flash drives, carrying them on our keychains, plugging and unplugging them into multiple devices and USB ports, and extending and retracting their USB connectors.
The Samsung Fit Plus 128GB offers the best balance of portability and durability of all the models we tested, thanks to a super slim profile and sturdy construction. However, it lacks an easy keychain attachment. The Samsung Bar Plus 128GB is just as durable and designed to be carried on a keychain, but is slightly bulkier.
The SanDisk Ultra Fit CZ43 256GB is super small. However, we found it a bit difficult to get out of a USB port. This isn't a huge deal but can get a bit annoying if you consistently switch it between devices.
The SanDisk Extreme GO CZ800 64GB has one of the smoothest and sturdiest feeling sliding mechanisms for extending and retracting its USB connector. Though plastic, it feels more solidly built than most plastic models on the market.
For those that want both USB Type-A and Type-C functionality, the SanDisk Ultra Dual Drive 128GB is the most convenient model we've found. A smooth sliding mechanism allows you to easily access either connector, or both can be retracted inside the protective metal and plastic body. Our only complaint is that the lanyard attachment hole is very small, so much so that we never managed to successfully thread it.
The SanDisk iXpand 128GB is the slimmest and simplest of the iPhone-compatible models we've tested. Though neither the USB nor Lightning connectors receive any protection, we like that the drive nestles behind your phone while in use. This makes it much easier to use your phone with the drive than models that stick out of the bottom, adding an awkward extra appendage.
Though USB drives may seem to be a dime a dozen, there are some models that offer far superior speeds and features than their competitors. We hope our objective testing results have helped you find a flash drive that will serve you well and become an everyday accessory, rather than one that will end up in the trash because of frustratingly slow file transfers.
— Max Mutter