DiskMark allows you to test the performance of your flash (pen/usb), solid state, hard disk drives in just 60 seconds. DiskMark performs real world speed tests and shows: + Sequential read/write speeds which is the performance you see when copying large files. + Random read/write speeds which is the performance you experience when opening or using programs that read and write a lot of files to disk. DiskMark is extremely simple to use and invaluable if you work with any USB drives (flash or external harddisks). And, a history of benchmarks lets you quickly compare your own drives.