Vansuny USB 3.2 Flash Drive 128GB, 400MB/s Super Speed Flash Drive, USB 3.2 Gen 2 Solid State Drive, Retractable Thumb Drive Portable Metal USB Memory Stick for PC Laptop

Honestly, i was waiting to get scammed on this one. Like some horror story you hear where you get fake memory sticks with fake capacities/speeds for really cheap. But no, not this one.For some reason, i bought two of them. And yes, i did pay for both, i saw the invoice and i bought two 128 GB ones, but i only wanted one... oops?.The first thing i did when i got them is use H2testw to see how badly i was scammed... and surprisingly, the full capacity was available for reads and writes! And HELLUVA fast too! 260 Mbps sustained read and 160 Mbps sustained write, on the H2testw software is really nothing to scoff at. Yes, it's lower numbers than advertised, but as usual i bet those are peak numbers and you can reach them in certain tests, but this is a full drive read and write. Not bad!For science, i opened one of my drives. I expected something a lot worse, but what i found was a flash UFS chip, the same ones that are used on mid to high end phones. I still don't think these things will last that long, the flash chip itself was partially lasered out so you cannot know which model the NAND is (but it was done badly enough that i could find it is a Sandisk UFS chip, model SDINDDH6-128G), but i bet these are NAND rejects that couldn't reach temperature or speed goals (hence the obfuscation effort) but still, it is not truly bottom of the barrel NAND like on truly cheapo commodity flash drives. It also has a decent UFS to USB controller (JMS901) so yes, you are definitely getting performance out of these.Only time will tell if they're as long lasting, but speed and capacity wise, these are awesome!

UPDATE: I originally said I was only getting half the rated speed from the drive. I couldn't figure out why writing to the drive was faster than reading. I decided that maybe it was corporate software installed on my system, so I repeated the CrystalDiskMark from my personal Laptop (Ivy Bridge era Thinkpad, Windows 10) and got much much faster speeds, both in reading and writing. I don't know if the tests are the same, but you can see a dramatic difference. It appears that the USB speed on my workstation is limited by the controller. I have updated my score to give it 5 stars.Original ReviewReceived the 64 GB flash drive today. It states (on the 64 GB drive version) that read speed is 400 MB, sec. I'm getting 170 MB/sec maximum. Curiously, I'm getting 213 MB/sec max write speed. It is the fastest writing (not reading overall. It is faster with random reads)) flash drive I have, but it's half of the rated read speed. Writing being faster than reading is curious. Is it using some type of ram buffer on-board?My computer (ThinkStation workstation running Windows 7) is USB 3.0 only (so theoretical max speed of 600 MB/sec). I have ensured it is plugged into a USB 3.0 port on the back of the machine. I've tested the drive empty and then after putting about 10 GB of files on it. With a 4 GB archive and a 4GB folder of about 1200 files, the transfer speeds were very fast (peaking above 200 MB / sec).Considering that I'm using this on a workstation that isn't connected to the internet to transfer files, I can live with questionable durability. I need something that is fast that won't corrupt my data over about a 20 minute time period. But I'm sticking to my name-brand USB 3.0 drives for data that I want to carry around with me regularly. It's too suspicious that write speeds are greater than read speeds, and the read speed is less than half of advertised.

Smokin' fast. Seems just as fast as a M.2 connected to my USB port.

UPDATE on 4/1/2024: It is now the end of March 2024, 1 year after purchase, and one has failed. It no longer writes without giving errors. I use it 10 or 12 times each year. I will buy one again to replace the defective one to see what happens. If it fails I will no longer recommend them.ORIGINAL REVIEW February 2023:I spent a little extra money because I wanted fast flash drives for backup. This is the fastest flash drive I have ever used -- literally twice as fast as anything else that I own. It will not disappoint.

This is a really nice USB stick. It is very fast, as reviewed previously bu others. The physical size leaves a bit to be desired, as it is probably 1.5 times larger than a similar HP drive. That is fine though as size is not as important as speed.

I bought a Vansuny 64GB USB 3.1 Flash Drive -( 350MB/s, Super Speed) USB from Amazon which arrived today. It cost $11.99. The read rate was 243.55 MB/s and the write was 81.69 MB/s.A Kingston DataTraveler Exodia 64GB USB 3.2 Flash Drive also arrived today from Amazon. The $5.00 price makes this USB drive a good buy for most users. The "check flash" program shows a read rate of 80.72 MB/s and a write rate of 13.88 MB/s.So you cannot depend on the label (3.1 or 3.2) as a predictor of performance. The higher read/write performance of the Vansuny is better for me since I don't want to wait for a long time while files are transferred. However, if you don't mind waiting about three times as long for the Kingston to read/write, you may prefer the very low $5 purchase price. I ran the read/write tests on an old computer that had an early model USB "blue" port. I also ran the same tests using a new (4 month old) laptop gaming computer. The read/write results did not not significantly differ between the two machines. You may find that your results differ from mine since the USB drives (even from the same manufacturer and model) will produce somewhat different results. FYI -- I am ordering two more of the Vansuny drives today.