Hey there, @hunfar!
This particular benchmark utility is mostly suited for transfer rate tests and it doesn't give accurate results about the health and SMART status of your hard drive. I'd recommend you use
the HDD manufacturer's diagnostic tool and test the HDD with it.
These transfer rate results definitely seem slow, though, especially if it's an internal 7,200 RPM hard drive. I'd suggest you try connecting it with a different SATA cable and to a different SATA port on the motherboard to see if the speeds will improve.
Make sure you backup all your data from the drive before proceeding with the troubleshooting. Better safe than sorry, right?
Keep me posted!

SuperSoph_WD