SanDisk Ultra Dual 32GB USB 3.0 OTG Pen Drive

Price ₹ 599

Free up space on your OTG-enabled Android phone

Back up your mobile photos, videos and contacts

Retractable design with dual micro-USB and USB 3.0 connectors

High-speed USB 3.0 performance with up to 130mbps file transfer from drive to computer

SanDisk Memory Zone application (available on Google Play) lets you easily manage your photos and videos

5 years limited warranty

People Review :

1) If you just want a USB drive, don't care about speed. Go for it.

If you want a USB drive, which is faster than USB 2.0, Go for it.
If you want to transfer small files. But faster, go for it.
Read Speed : 20MB/s average (Stays constant until 970mb on a 1000mb test)
Write Speed : 83MB/s average ( 153MB/s until 256MB, 55MB/s until 256MB to 1000MB in 1000MB test)
This 83mb/s average will drop with bigger tests like 4 or 5 GB.
Please click helpful button, if the review helped you choose and if you want to see reviews like this in future (in a engineer point of view).

Advanced-
This usb drive has a TLC flash. How i know is by the speeds. It also should have 256mb DRAM Cache. That explains the first jump in speed. This can also be due to the controller.
Did sandisk program the controller to throttle after 256mb read? Possible.. Its the only explanation for if they used MLC.
Write Speed was pathetic 20MB/s. I don't have anything to say... its just pathetic.
Access latency is higher in this . It is in the margin of error.
Please Open the image I uploaded. Image of benchmark.
Thermals was also pathetic, drive reaching 60degrees in less than 30 sec.

My call-
I bought this for my mother. I think for her use, speed don't matter. But sandisk is boasting 150MB/s in product page. Which is wrong and against engineer ethics. I have seen USB drives go downhill these years as customers don't bother about speeds. If they see a pulse speed, they take that as the real speed. Easily fooled by sandisk or any USB drive manufacturers. So the main problem is, there is no spec sheet. There is no real benchmark graphs from manufacturer.

We have to fight. We want faster controller. Controller that can handle 3.0 bandwidth. A flash that can handle 3.0 bandwidth. A controller that wear levels properly.

2) Firstly surprise to see this miniature at this price that is Rs. 649 bought it two days ago and it arrived today. I started testing this pendrive and i was totally shocked regarding its read and write speed.

results -
1. copying 1.8gb file from laptop to pendrive speed = 40mb/s average
2. copying 1.8gb file from pendrive to laptop speed = 290mb/s average
3. cut-paste 2.8 gb file from laptop to pendrive speed = 43mb/s average
4. cut paste 2.8 gb file from pendrive to laptop speed = 80mb/s average
p.s (All these results are based while using pendrive in 3.0 usb slot in laptop.)
Also you have to put your finger for support behind the handle to push the p.d into the usb slot otherwise it will slip backwards.

3) Works fine but heats up a bit.

Works out of the box on Android phones. And it's USB 3 and not USB 2, so the speed is a good.

A lot better than purchasing cheap USB OTG adapter and plugging normal pen drives. But it's also good to have a OTG adapter in your arsenal since you might need to connect a normal pen drive some day.

But the problem is it is very small and so, it heats up pretty soon.

4) I had my old otg pendrive broken and so I had purchased this one. Now I feel that if I myself made a plastic covering to hold my broken sandisk pendrive, then it would just look the same one I bought it right now. One fall to the ground and this pendrive covering will be boom.

5) I never liked the messy OTG cables in between my phone and pendrives, so it's perfect for me :P

I've been using it since a month and it's working quite smoothly. Read/Write Speed is around 50-60 Mbps. Pretty good.
Design is okay... small, easy to carry but it can be improved. It takes a little practice to smoothly switch between the two connectors.
Considering its price and what it offers it can be considered a value for money but it could have been better if it had a cap to protect the connector from oxidation and dirt.