Top critical review
Advanced Review : Bad, very Bad! Slow R/W Speed on 3.0
30 December 2018
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).
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.
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.