SanDisk 256GB Ultra Dual Drive USB Type-C - USB-C, USB 3.1 - SDDDC2-256G-G46,Black

Great product and very easy to use. Sundisk quality is always great. This item helped me to save my photos on my Pixel phone. I was surprised its functions worked so well.

As soon as I received the flash drive I unpacked it and hooked it right to my wife's phone the main reason I purchased, she had 51g's of just video and 30g's of photo's on her phone and it was dragging so slow it wouldn't send or receive texts messages.. This drive moved her photos over in less than 10 minutes which I thought was pretty fast for that many pic's and the video's took close to 30 minutes to transfer, still a decent speed for these large files.. The flash drive did get hot moving at those speeds keep that in mind. But it performed very well and very satisfying I was able to wipe the phone right after to get her phone back to operating like it was supposed to.. It might take you a few minutes finding how to setup the transfer, then stand back and let it do it's thing! I would buy again..

I initially bought two of these USB-C/USB-A dual thumb drives to use as backups for my data. I like them because they are compact, reliable, fast, and very convenient. I like that it's easy to carry around in my purse since it's so small. Also, my laptop has a USB-C port and two USB-A ports, so I really like the flexibility that I can use this thumb drive in any of those.Everything was going along fine using these for my regular data backups until....I put one of these thumb drives in my pocket and forgot about it, and sent it through the clothes washer and also put it into the dryer and "dried" it. I heard the clacking around in the dryer and...there it was. And when I took it out of the dryer, it was HOT. At that point, I decided to immediately buy an identical replacement for that one, and not take a chance on continuing to use it. I didn't want to risk that the washed one would fail on me sooner or later, have shorter lifespan, or loose any data. After receiving the third one (the replacement) and doing my regular backup onto it, I then decided to try to the one that I inadvertently washed and dried and....it works perfectly with no loss of data. At least so far.So for now, I have THREE of these and am keeping the washed one as an additional backup thumb drive.I really like the convenience of these thumb drives, the dual USB-C/USB-A ends, the large amount of data that they hold, and the reliability. I don't recommend that you send them through the washer and dryer like I did, but if you do so, well, now you know that it will probably continue to work!I recommend this thumb drive and am very happy with it!I write honest reviews to help others make informed purchases because I read reviews myself and appreciate how helpful they can be. I hope that my review helped you!

This is an excellent storage solution on the go, and as someone with enough USB Type C and Type A devices, the convenience is a godsend that can't be matched by cables. Moreover, the SanDisk Memory Zone app is simple and works well, which surprised me because in the past I've thought SanDisk utilities were little help and annoying to use. I liked it so much and it was simple enough to use that I got one for my dad to use with his Android phone and laptop. I paid $22 for 128 GB, which is a good storage deal in 2019 IF all the specs listed are met...HOWEVER this is where I'm sorely disappointed. The read speeds are near advertised and acceptable, but the write speeds are far slower at about less than a third of what's advertised. Moreover, the drive gets concerningly hot, particularly when it is being used in Type C mode. However, both read and write speeds are a touch faster in Type C mode as well and makes me call into question the buses used to interface with the memory, if the drive really is USB 3.1. When I plug it into my computer, the disk label reads 3.0, so I'm not sure whether they marketed the information or labeled it incorrectly. Moreover, there was a rumour that this drive is actually a micro SD card slotted into a dual adapter they've rigged up, which I could believe due to the sad write performance of the drive. Not in the mood to crack it open and break it to find out, but I definitely will once it fails.SanDisk has a reputation and it kinda makes me sad to see a product miss the advertised marks this badly. As someone in tech, I keep an eye on the specs and rely on them to be true to the device which is why it frustrates me so much when a legitimate company makes mistakes and flat out lies like this. It makes me not want to give them money.So why did I rate it 4 stars?Because I'll be damned if this isn't the best flash drive I've owned, lies and all. I've been waiting for this type of drive for a while and most reputed companies haven't put one of them out yet, probably because the technology isn't good enough to have consistent enough quality in speed, which apparently SanDisk isn't bothered with ;) The convenience and the huge amount of storage for $20 on a drive that will actually work on all of my devices at a decent pace is too much of an allure to pass up. As long as the file isn't too big and I use this as a casual, day to day drive as most people will, this will work well enough. Moreover, the app is so dead simple and convenient for even the tech illiterate to use. May still want to attach to a cable for those 4K videos though.Speeds in my pictures were collected using CrystalDiskMark. Faster speeds collected through USB-C Thunderbolt interface on same machine as the USB-A test, run on 3.1.