Top positive review
Almost reaching closer to rated speeds. But not quite.
Reviewed in India on 20 March 2017
After owning Sandisk Extreme 64GB USB 3 drive for last 3 years, buying this 256 GB version with improved read/write speeds is a no brainer.
Testbed: Intel 6700K, ASUS Maximus IX Z270 Hero, 16 GB RAM
Internal SSD: Samsung 950 Pro NVMe M.2 drive to avoid speed bottlenecks
Tested port: USB 3.1 Gen 2 Type-A 10Gbps port powered by ASMedia controller.
Extreme Pro 256 GB was formatted to NTFS file system with default allocation size.
Crystal DiskMark synthetic benchmark
Write speed: 400 MBPS
Read speed: 427 MBPS
Sequential speed tested in Windows 10 file copy (real world performance)
Write speed: 323 MBPS
Read speed: 421 MBPS
As you can see, the synthetic benchmarks deliver the rated performance. But in real world scenario, write speed falls short by around 60 MBPS. But still this one is one of the fastest USB based flash drive.
If you use USB 3.1 Gen 1 Type-A 5 Gbps port (formerly USB 3.0 port), then you may see slightly reduced speeds.
But I would still recommend this drive if you can get past the insane price.
That is why one star reduced for lower than advertised write speed as well as high price.
Enjoy the speed test photos.