Check Adobe Flash Player checks both the surface as well as the data throughput of USB flash drives. With the freeware you can learn fast and easy, whether the computer uses the full transfer speed of USB media. Check Flash checks the read & Write speed of flash disks, USB sticks, etc. For this, various tests. one wonders about the occasional data loss on USB media, so is the Surface in different variants to the side. The application of free Benchmark and audit tools is simple, but can take a while depending on the size of the storage medium to be tested. Conveniently, check Flash does not require installation, so is suitable for portable use on a USB stick & Co. More information about USB's measuring the speed's the tip: Software Blog.