CrystalDiskMark is a small free program designed for benchmarking (testing) the performance of computer hard drives. Allows you to measure the speed of reading and writing data.
The program does not require installation and is very easy to use. You must select a hard disk, a test file size (from 50 to 1000 MB) and the number of runs (from 1 to 9). After a short test, the average speed of reading and writing to the hard disk of the main file, blocks of 512 and 4 kb will be issued.