AS SSD is a great free tool designed just for benching Solid State Drives. It performs an array of sequential read and write tests, as well as random read and write tests with sequential access times over a portion of the drive. AS SSD includes a sub suite of benchmarks with various file pattern algorithms but this is difficult in trying to judge accurate performance figures.
Using the more demanding ASSSD benchmark saw the Sequential reads drop to 2,504MB/s with writes at 2,211MB/s. Both of these figures make the G-Drive mobile Pro SSD the fastest single drive external device we have tested to date with the benchmark.