On Sandra we run the File System Benchmark module and used two parameters, the overall performance (called “index” by Sandra), measured in MB/s, and the random write speed, also measured in MB/s. Usually write speeds are lower than read speeds, so it is also very important to know the write speed, not only the read speed of an USB drive.

In Sandra OCZ Rally also achieved the best reading performance, being 46.67% faster than Corsair Flash Voyager, 144.44% faster than Kingston DataTraveler 2.0 and 175.00% faster than MSI Mega Flash. Corsair Flash Voyager was 66.67% faster than Kingston DataTraveler 2.0 and 87.50% faster than MSI Mega Flash.

As for writing performance, OCZ Rally and Corsair Flash Voyager were tied with 8 MB/s, being 33.33% faster than MSI Mega Flash and 337.88% faster than Kingston DataTraveler 2.0.

Using these results, we can make a rough calculation of the time you would spend filling up your USB drive, i.e. transferring data from your PC to your USB device. The MSI model achieved a better time because its capacity is only of 128 MB. If it were a 512 MB part, its transfer time would be 85.33 seconds.

Product	Transfer Speed	Transfer Time
OCZ Rally 512 MB	8 MB/s	64 seconds
Corsair Flash Voyager 512 MB	8 MB/s	64 seconds
MSI Mega Flash 128 MB	6 MB/s	21.33 seconds
Kingston DataTraveler 2.0 512 MB	1.83 MB/s	279.78 seconds