Vansuny USB 3.2 Flash Drive 256GB, 400MB/s Super Speed Flash Drive, USB 3.2 Gen 2 Solid State Drive, Retractable Thumb Drive, Metal Memory Stick, Portable Jump Drive

As an embedded systems designer I was skeptical that the 256GB VANSUNY Super Speed USB Flash Drive would actually operate as advertised. However after a few days of testing and real world use I've found that indeed it does. For those who don't want the technical details, just know that the 400 MB/s read and write speeds are real, the device is no wider than a typical USB thumb drive, it does not get excessively warm or hot, and it is fully bootable with both Windows and Linux. Now here are the details. This device is indeed an SSD, and utilizes a JMicron SATA/USB interface to allow it to operate as a thumb drive. It appears to have a 10 GB cache that allows it to achieve the rated 400 MB/s read/write speeds for smaller files, and after 10 GB it achieves consistent 360 MB/s read and 160 MB/s write speeds. This is quite good, and in line with other low cost SSD drives. I tested the unit with 10 reads and writes of 80 GB files utilizing a Sabrent 1TB Rocket NVME drive that achieves consistent 2000 MB/s read/write speeds. The VANSUNY drive barely got warm during the tests, and all files were transferred without error. After this I installed both Windows 10 Professional and then the latest Arch Linux and verified that the operating systems booted and operated on both physical hardware and virtual machines. Unfortunately I was unable to determine the other components utilized in the VANSUNY drive, so there's no way to know how reliable the drive will be for the long term, or how long it will last. However if I encounter quality issues in the future I will update this review.

I put the drive in my Sony Z9K TV that supports Android TV to add extra system memory storage. Everything I transferred over did so very quickly compared to the very old 32 gig USB drive I tried to use. Unfortunately the Sony being brand new didn't play well with USB memory devices and keeps restarting and having issues trying to read the drive. The drive itself is very fast and fine, the TV is having the problems. It was cheap enough I will use it on something that works well with external memory devices and be happy. IF you have new Sony top line TV with Android keep this in mind, you might have problems using any USB drive for system memory till they update the firmware. UPDATE: Someone said you go to Remote setup, and change RS232 from HDMI to Serial and then decent memory USB drives will work. It fixed this drive in my Z9K and now the TV starts up fine and uses the drive as expanded system memory like it should. I also activated Developer Mode so I could force it to allow more apps to use the external memory from this USB stick and it is very fast.

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 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.

Just like a SSD in the form of a USB drive Excellent value Too soon to comment on durability

If you're considering this vs a regular usb, buy this. There's no comparison.

SanDisk等の定番メーカーの製品からは、ハイエンド製品以外ではアクセスランプが無くなってしまいました。 こちらの製品はノーブランド品ですが、安価でも高速かつアクセスランプを搭載しています。 アクセスランプは白色で、プラ筐体の下にあって筐体を発光させます。「インジケーター用の窓」はありません。 取り外したキャップをお尻に取り付ける事ができず、紐を通す穴もありません。紛失しやすくデザインには全く取り柄はありません。 アクセスランプは抜去する際の指標になるほか、特にブータブルUSBとして使用する場合に重宝します。上手くブートできていない際に、読みに行けているのか判断できるからです。 ノーブランド品という事で、消えたら困るデータを入れる運用はしない予定です。耐久性も現時点では不明。ブータブルUSBや一時的なデータの受け渡しに活躍しています。

読み込み速度は速く満足していますが遅いUSBポートで使用すると接続がきれることが有り認識しなくなる場合が有ります。

一眼レフのデータのバックアップ用に良いUSBを探していました。 他にも購入したのですが、（中華ブランドのと、バッファロー）途中エラーが出て書き込めなかったり死ぬほど遅かったりでどちらもいまいちでした。 でもこちらのAmazonのものは先に買った2つに比べるとものすごく早かったのと動作も安定していてエラーも出ませんでした。 容量もかなり大きいし、値段も安いのでおすすめです。