![]() I'm not sure if the above issues can be fixed with a firmware update for the Extreme Pro 3.1 USB stick. What has SanDisk done about this problem? Absolutely nothing as their current generation Extreme Pro 3.1 USB stick is still missing these important features. SanDisk were made aware of the speed issues with their previous generation Extreme Pro USB stick and were told it was due to these two missing features (TRIM and UASP). TRIM support via UASP (which would of been possible with the Extreme Pro if SanDisk did add UASP support and support for translating the SCSI UNMAP command to ATA TRIM.)īoth the above features (UASP and TRIM - if the Extreme Pro had them) would have greatly helped to maintain the overall long-term speed performance of the Extreme Pro 3.1 USB stick. Here are the 2 most important features that are missing from the Extreme Pro 3.1 USB stick:ġ. I have come to the conclusion that the Extreme Pro 3.1 USB stick is missing 2 crucial features, and these 2 missing features are the reason the Extreme Pro 128GB 3.1 USB stick can not maintain its stable fast write speed performance after 200GB to 250GB of data in total writes has been written to it. I also "low-level formatted" the Extreme Pro, but that made little difference. You could use the "SanDisk SSD Dashboard" software and select the "Wipe Media" option to completely erase the USB stick which will temporarily restore the USB stick's steady write performance, but after I transferred 10GB of data to the Extreme Pro USB stick, speeds are now fluctuating again. CrystalDiskMark is now showing the write speed at 121.6 MB/s when it use to be 240 MB/s. The transfer speed is now fluctuating up and down between 20 MB/s to 175 MB/s. The transfer speed is no longer steady when copying over the same. ![]() Sandisk 256gb flash drive 3.1 movie#mkv movie files to the stick at an incredibly steady 180MB/s transfer rate (with write cache disabled in Windows 10). Just like the first Extreme Pro 3.1 USB stick that I received from Amazon, when I first started using this USB stick, I was able to transfer. Again, like the first stick the problem starts after I have transferred a total of 200GB to 250GB of data to the Extreme Pro 128GB 3.1 USB stick. Now the replacement I have received from Amazon is having the exact same problem. I thought the Extreme Pro 3.1 USB stick I received was faulty so I got Amazon to send me a replacement. The first Extreme Pro 128GB 3.1 USB stick I received from Amazon started having write speed problems after I had transferred approximately 200GB to 250GB of data in total to it.
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