SanDisk Ultra Dual USB Drive 3.0, SDDD2 16GB, USB3.0, Black, USB3.0/Micro-USB Connector, OTG-Enabled Android Devices, 5Y

Very good product...!Gave me 75MBps while copying a 3GB file from Laptop to Pendrive on USB 3.0 port...!My laptop also has USB Type-C port...i did the same test as above...speed was same on the Type-C port...75MBps...but the speed was more consistent than USB 3.0 port...from start to end speed never dropped below 75MBps...!While on USB 3.0 port, speed dropped from 75 to 40-45MBps for 7-8 seconds, then again it goes up to 75MBps, this happened 5-6 times while copying a 3GB file...!My phone also supports Type-C port...i didn't check the speed of file transfer...but it worked perfectly...no problems...!So overall great product...!

First thing first, this pendrive heats a lot and very fast and when it does the transfer rate is fallen down by significant margin so a star is cut for this factor.Now the good parts, easy to use and fits in phone and laptop easy and works without any 3rd party software in phone( oneplus 6t in my case). Speed of data transfer is fast in fact this is the only pendrive that actually gave me 155MBps rate at its peak......before succumbing to inevitable ( overheat). That is good speed in my eyes. Lastly built, well its decent has some wobbles here and there nothing much, long term use still needs testing will edit the review if issues arrive buy yeah so far so good. Photo added of its fall start and prior to it.Test rig asus rog strix laptop and OnePlus 6t phone. Took less than a minute to heat in room with mid 33ish degree temp.

Warning to all buyers:The product has slow writing speeds. On big files starts at about 35 MBps, soon drops to 12 MBps and if used for long, drops even to 15 kbps!!!!The product gets very hot, very fast. Unlikely to last long.Pros: Small size, has dual connectors (Type C and TypeA)Was going to buy the 256 GB variant, but just cancelled it!

The media could not be loaded.  The type c drive size is larger than the slot of gioneeA1 and redmi5, so unable to connect with them, not checked for other mobile phones ,, if we are anable to connect it with cellphone then why should we bye it....

I Ordered the product for my Mac because of the USB C option, but turns out it is too big and cannot be used in the c port of my mac. Very displeased with the product as the hse I bought it for is not satisfied. Shame Sandisk. Really waste of money for Mac users.

This pendrive is my 5th SanDisk pendrive and I also bought 7 SanDisk micro sd cards. It is just the brand's quality and service experience that tempt to buy storage devices from SanDisk. Lets come to the performance, however to get fast speed you must have fast USB ports like USB 3.1 you can get enough speed through 2.0 ports as well. After trusting SanDisk for so many years, I will definately recommend this pendrive.

The media could not be loaded.  Since I was busy in other task, I opened it after 1 month and all I got to know is, type c isn't inserting in mobile hence I am not able to use it which is highly frustrating & annoying !!!!Now the returning window is also closed and don't know how to complain them about this. As I've shown in attached video, I think the problem is there inside the type c pinIf anyone have any idea or can help then I'll appreciate the same

Value for money,It is easy to use but sometimes the c port won’t come out completely and you need to push it hard into your PC which could might break it.It not durable at all.It can only support daily use with good care.It is also hydrophobic in nature.Due to water it’s usb-A port got stuck and it couldn’t be used again.

Ok, I'll start with the positives. It's a very handy, small USB stick that you can take anywhere with you. With a 256gb storage you'll probably never run short of space, and having a retractable USB type C and standard USB connectors it's very convenient.However, this is where the positives (for me) stop. I'm a wedding photographer and halfway through the day I transfer all images taken to that point over to my MacBook Pro (USB-C only). From the Compact Flash cards (160mb/s rated read speeds) I use a USB C 3.1 adapter and I transfer about 70gb of photos in about 10-15 minutes using his method. This is actual times experienced.I then transfer the copy fro my MacBook to this 256gb SanDisk 3.1 drive (rated 150mb/s read speeds) For those who don't know, 3.0 is the same as 3.1 (gen 1) in terms of speed. They simply renamed 3.0 to 3.1 for USB-C devices.This last process should take 10-15 minutes also, but in reality takes over TWO HOURS to complete. Why? Why does this take so long compared with the 15 minutes it takes for me to transfer from the SanDisk CF Cards using the very same ports and technology?For me, this device is absolutely not fit for purpose. If I wanted these speeds I'd opt for a USB 2.0 USB drive.SanDisk, any comments?

By "typically" I mean not massively fast, but at the expected speed most of these 150MB/s flash drives are rated for.- Test setup (March 2018):Straight into a Thunderbolt 3, 2016 15" fully spec'd Apple MacBook Pro. Using this SanDisk 64GB drive in new/unused/pre-formatted (FAT32) condition, straight out the packaging.Tested using Blackmagic Disk Speed Test, at Blackmagic's 1GB and 5GB sizes. Using the drive's USB-C plug or it's USB-A plug (with an Aukey USB-C-to-USB-A adapter) directly into the MBP:50-60 (write) / 160-170 (read).- Result:So read's on an empty drive are as expected, write's are a bit slow; but TBH they're well within what most of these flash drives' performances tend to be that advertise themselves at the "150MB/s" rated standard.- Summary:If you want to spend 2-4 times more on a flash drive that advertises newer "300MB/s" speeds, then of course you may get around a doubling of the read and writes shown here. But of course you're paying usually significantly more for the privilege, and those flash drives are typically much bulkier as well, this one is only 4x2x1cm in size. Also, there are currently NO others (or at least none from main brands) on the market that do both USB-A and USB-C on one stick.This does the expected speeds, connected using the expected types.As of March 2018... If you need both A+C connection types, this is the one you're gonna need to buy. If you want faster speeds, at a higher price (19 quid for 64GB model), whilst sacrificing having both A+C USB connections, then look elsewhere.-----------EDIT (one week later):Two quick points...1) Faster drive.Those looking for SanDisk's ~300MB/s speed drive, which is more expensive (~double the price/GB), bulkier, only has a USB-A port and no USB-C port. Then the "SanDisk Extreme PRO" the current one they do in 128GB & 256GB sizes:https://www.amazon.co.uk/gp/product/B01MU8TZRV2) Format.I should have said originally, Mac users will likely want to reformat the drive in Disk Utility app.The drive natively comes in FAT32, which only allows max file sizes of ~4GB. So I used "Mac OS Extended (Journaled)" and "GUID Partition Map" type. Likely only work on Macs though, but that's my work environment. Speeds quoted in main review above remain the same, BTW.ExFAT could also be used (not sure whether that's as "Master Boot Record" or "GUID Partition Map" type? – I think the latter is best for newer OS's like Sierra onwards or Win 7 onwards?), but that's got limitations (e.g. max 11 character drive partition names), see here:https://support.apple.com/kb/PH22240?locale=en_GBHope this helps any Mac (and Win) users who are unsure.

Like many people, I've used dozens of Sandisk products over the years both at home and at work, and by and large I've no cause for complaint. So when the time came for me to buy a new flash drive, I had no hesitation in choosing another Sandisk product.Sadly I was deeply disappointed.This device gets very hot in use, is very slow when copying anything, it corrupts data and sometimes loses data. Reformatting it has no effect on either it's speed or reliability.Because I use it at work and it carries sensitive information, when it started going wrong, I had no choice other than to physically destroy the device rather than return it for a refund.It has been a complete waste of time and money.FWIW I used it on both a MacBook Pro running Mojave and PCs running Windows 10.

Ho acquistato questo prodotto per dare più versatilità al mio nuovo MacBook Pro (2018) in ambito di lavoro. Avendo solo la Tipo-C (prestazioni eccezionali eh!) diventa un po’ limitante nel caso di scambio di file fra colleghi o con computer fissi.Ho scelto questo prodotto in particolare perché fra le offerte del marketplace mi sembrava l’unico non progettato unicamente per telefono, ma qualcosa di più simile ad una vera e propria chiavetta anziché un OTG “cinese”.SPEDIZIONE E PACKAGING:La chiavetta si presenta dentro alla confezione di cartone della Sandisk, bella protetta e avvolta. Direi anche troppo! Sono impazzito ad aprirla.Il contenuto è semplice: c’è la chiavetta e basta.Ottimo, perché vari foglietti illustrativi o altre cose sarebbero superflue.FUNZIONALITA’ E DETTAGLI:Inizialmente sono rimasto davvero basito da quanto è piccola! Per accomunarla a qualcosa di uso comune è lunga quanto la parte intagliata di una classica chiave per aprire le porte. Più piccola delle chiavette medie di circa 1cm. Ottima cosa per la portabilità, ma occhio a non perderla!Al centro presenta da un lato la levettina “slider” che permette di far uscire la 3.0 da un lato e la tipo-c dall’altro. Dall’altro lato c’è un foro passante per inserire un portachiavi o un filo per tenere la chiavetta.Davvero ottimo il fatto che quando viene riposta entrambe le estremità non sporgono dalla struttura e restano protette all’interno. Bellissimo il design un po’ alluminio spazzolato e un po’ plastica con una filigrana a piccoli esagoni. Ti fa subito capire che non si tratta di una cinesata ma di una chiavetta seria.Ho scelto la dimensione di 64GB, che si presenta con 61,49GB di spazio disponibile. All’interno un file PDF che spiega come collegarla a dispositivi Android e un file .apk per l’installazione del tool di riconoscimento della chiavetta. Io li ho tolti perché non erano di mio interesse, ma ottima l’attenzione della sandisk ai dettagli.Quando inserita nella porta del macbook, che è bella vicina all’altra, non crea ingombro tale da impedire l’uso della porta accanto. Tuttavia HO RISCONTRATO UN PROBLEMINO: le nuove porte tipo-c del macbook sono molto “dure”. Ovvero occorre spingere molto forte per inserire a fondo la chiavetta fino a sentire un click, che assicura una ottima tenuta. Questa è una caratteristica del computer che però si sposa male con l’anatomia della chiavetta! Avendo lo slider al centro, quando si va a spingere per inserirla, l’estremità tipo-c tende a rientrare nella chiavetta. Occorre esercitare una buona forza sulla levetta slider che, essendo in plastica, non ispira chissà quanta resistenza pensando all’uso da qui ad un po’. Non mi si è rotta o piegata, soltanto sarebbe stato più utile inserire una sorta di dentino di blocco per assicurare la tenuta della testina una volta portata fuori dalla chiavetta.Detto questo vi allego nelle foto il report per lo Storage. Ho effettuato uno stress di 5GB con l’ormai blasonato Blackmagic Disk Speed Test. Ho attaccato la chiavetta dall’estremità tipo-C direttamente alla porta laterale del macbook.Si conferma quanto detto dalla SanDisk, la velocità di lettura arriva anche oltre i 150MB/s dichiarati. Buona anche quella di scrittura che si attesta intorno a 56.0 MB/s anche a seguito di test ripetuti e con stress di differenti dimensioni (1GB, 3GB, 5GB).Connessa al PC si apre subito, senza dover attendere tempi millenari per l’installazione di non si sa quali driver, come spesso accade con prodotti della concorrenza.RAPPORTO QUALITA’ PREZZO:Al momento dell’acquisto (luglio 2018) ho pagato l’articolo da 64GB soli 29€99€. Il prezzo per quella da 32GB era di 24,99€. Questa sproporzione non me la spiego, ma per 5€ conviene assolutamente quella da 64GB. (Dipende poi anche dalle vostre necessità)Penso che sia un prezzo davvero ottimo, per una chiavetta con tali prestazioni e che permette una ottima flessibilità ora che siamo nel periodo di cambio dalle classiche USB Port alle nuove type-c.Ricomprerei il prodotto senza dubbio. Anzi, sto valutando di acquistarne un’altra per poterla lasciare in una tasca dello zaino o in ufficio, oltre a quella che tengo sempre nella borsina del computer.È ESSENZIALE SE AVETE UN MacBook Pro.Spero che la recensione sia stata utile. Se ci sono domande o curiosità di ogni genere sono sempre disponibilissimo all’indirizzo che trovate sul mio profilo utente! Grazie e buoni acquisti!

For those reviewers that who said it is slow - they probably have never used other USB sticks or their computers have slow USB 2.0 ports.This USB has very fast write performance for its price (Blackmagic benchmark for 4G files is about 30MB/s longterm and real-life performance is also very good). I had those very small "dual" USB drives from top brand and some of their write speeds are about 5MB/s on average. You can find faster sticks but the size will be larger and be more expensive.This USB stick is good value. Apple store sell a custom made edition of this model but charges £75 for the same 64G capacity.The major issue is that the package doesn't come with a lanyard for connecting the USB with keychain and I have to buy those separately. The position of the connection for lanyard is at the middle of the body which is very odd. But given the price/performance and the reputation of Sandisk, I can live with that.