if you want put a real SSD in it (but that would require the removal of the 2,5 inches 1TB HDD).
the laptop has a sata 3 thingy but the HDD doesnt support it so its wasted. a SSD will fasten your laptop to the maximum (but SSDs cheaper than 200€ are a waste of money imo).
and before you format the HDDs make sure to copy the drivers which are backup'ed there because those are HUGE. graphics driver#1 440MB, #2 200MB, sound 150MB, wlan 150MB, bluetooth 150MB etc...